PSYC 337 LEARNING: An Introduction 02.03.2022 DEPARTMENT OF PSYCHOLOGY Lecture objectives Gain a general/overall idea of what the course is about Understand course rubrics/ expectations of students/lecturer Understand basic definitions of learning Differentiate between learning, knowledge & performance Be able to explain why animals are used in learning experiments Course Overview General Overview Psyc 337 discusses interesting & important aspect of psychology: Learning! The course is designed to: Help us understand the concept of learning and its relevance Help us know about psychological experiments that help explain how we learn Update us with the different theoretical viewpoints concerning learning Help us understand how principles of learning can be applied in everyday life to understand, explain, predict and control behaviour General Overview Expected Learning Outcomes: Demonstrate understanding of learning & awareness of the different ways in which learning has been defined over the years & across disciplines. Differentiate between learning, knowledge & performance Explain various theoretical approaches to the study & understanding of learning Explain the concept of cognitive maps, verbal learning procedures, & transfer of learning. Demonstrate how learning theories can be applied in therapeutic interventions for problem behaviours Discuss the relevance of learning principles in your own life situations and those of General Overview Plagiarism Policy: Plagiarism in any form is unacceptable and shall be treated as a serious offence. Appropriate sanctions, as stipulated in the plagiarism policy, will be applied when students are found to have violated the policy. ALL students are expected to familiarize themselves with the contents of the Policy. Please see: http://www.ug.edu.gh/aqau/policies-guidelines General Overview Assessment and grading: Interim Assessment 60% (2 tests) End of Semester exam 40% IA & Exam formats will be communicated at a later date Grading Scale: Refer to undergraduate handbook Points to note: Course content may be modified in the course of the semester where necessary Please check department notice board for tutorial times and please attend tutorials. General Overview Class Norms: All students will participate in class Classroom manners: Mind your language Respect everyone’s views/ opinions Endeavour not to be late to class Please mute your phones General Overview Students with special Needs: Contact Office of Disability Support Services The Counselling and Career Center can also help You are welcome to speak to the lecturer for any assistance they can provide General Overview Course Delivery Schedule & required reading Check the course syllabus READING Spielman, R. (2014). Psychology – 2e. (2nd. Ed.) New York: OpenStax Available online at : https://openstax.org/details/books/psychology-2e • Recommended Textbooks Defining Learning So what is learning? Think of how a child goes from just giggling to using complex language Or reflect on how you became a bicycle rider These scenarios are different but occur through the process of learning Some psychologists believe that all human behaviours are learnt In order to understand these behaviours, we must understand what learning is and how it occurs Defining Learning For centuries, psychologists and scholars in other disciplines have been interested in how humans and other organisms learn This interest ties in with our quest to understand and influence behavior. However: There continues to be challenges in establishing a single, universally accepted definition of learning Over the years, various scholars have given their ideas of how the concept of learning can be defined: Defining Learning Hall (2003): “Learning refers to the process by which an animal (human or non-human) interacts with its environment and becomes changed by this experience so that its subsequent behavior is modified” 2. Breedlove et al, (2007) “The process of acquiring new and relatively enduring information, behavior patterns or ability characterized by modification of behavior as a result of practice, study or experience Mazur (2013): “Learning is a process of change that occurs as a result of an individual’s experience” Psyc Central (2018): “…Learning can be defined as the process leading to a relatively permanent behavioral change or potential behavioural change…” See: Baron et al (2015). Embracing multiple definitions of learning. for a list of other definitions given by scholars from different discipline. Defining learning The most commonly used definitions of learning in psychology: Mayer (2009) “Learning is a relatively permanent change in a person’s knowledge or behavior due to experience” Or Lahey (2012). “any relatively permanent change in behaviour brought about through experience” The various definitions show certain key characteristics or components of learning that scholars agree on. These components or characteristics are often referred to as attributes of learning Attributes of learning 1. Learning is a process: Learning occurs over time and follows a process and is not a single event. It begins from somewhere. E.g. One event and continues before actual learning occurs 2. Change due to learning is long-term, not short-term The phrases “enduring” and “relatively permanent” used in the definitions mean that the change that occurs during learning lasts longer compared to other changes in the individual that are not a result of learning. eg,. injury, fatigue, illness, mood swings & changes that occur automatically in response to external events, like shivering when it’s cold & sweating when it’s hot. Attributes of learning 3. The learning process may not be directly observable: The actual learning process may not be directly observable because the acquisition and storage of information are internal processes. The organism learns alright but we see no change in behaviour immediately until it is required. 4. Experience causes the change The change in behavior is not evident/ does not occur until the individual goes through a prior experience. Therefore, the cause of the change is the learner’s experience in the environment rather than fatigue, motivation, drugs, physical condition or physiological intervention. Attributes of learning 5. The change in behavior desirable/ undesirable: Learning results in a change in behavior. This change may be intentional or unintentional and could be for better or for worse. The new behavior could be a desirable one or an undesirable one. Eg. Vomiting after eating a food and feeling disgusted on seeing that food after this episode Home work: Search for other attributes of learning Relevance of learning Class activity: • In the next 5 minutes write down five points explaining why learning is important to human life • Now lets discuss your points Learning, knowledge, performance Learning, knowledge, performance Learning: The process through which behavior is changed due to experience. Knowledge: Information obtained through experience that is stored in the brain Performance: Actions demonstrated with the aid of the information obtained through experience and stored in the brain Approaches to the study of learning Approaches to studying learning Different psychologists have used different approaches to study learning based on their orientation Three of such approaches are: Behavioural Approach Cognitive Approach Biological/Neuropsychological Approach Approaches to studying learning Behavioral Approach: Earliest approach to studying how organisms learn Believe learning occurs through stimulus-response mechanism Emphasizes relationships between : Observable Behaviors The antecedent stimuli that precede behavior The consequences that follow the behavior Methodological approach: Animal/human experimentation and observation Approaches to studying learning Cognitive approach: Focuses on the role of cognition in the stimulus-response mechanism Believe that cognitive interpretation of stimuli produces eventual learnt behaviour Argues that organisms form mental/internal representation of stimuli, process it, before exhibiting a changed or unchanged behaviour Methodological approach: Animal/human experimentation with cognitive inference Approaches to studying learning Biological/ Neuropsychological approach: Focuses on underlying biological basis for learning and memory. The goal here is to discover the biological events/processes that take place to produce learning Eg. Changes that occur in the nervous system when learning occurs Methodological approach: Brain imaging techniques, surgical procedures using mainly animals Using animals to understand learning Animals and the study of learning Animals have been the main experimental subjects in learning experiments This is because of Practical and Ethical reasons: Practical Reasons: Darwin’s theory of evolution: Human beings evolved from animals The genetic heritage, history, and environmental experiences of animals can be easily controlled and manipulated. Humans have a higher tendency to alter their behaviour when they know they are in an experiment. Studying how animals learn can help identify principles that can be applied to human learning. Animals and the study of learning Structure & functions of the central nervous system: There is scientific evidence showing that the structure and functions of the CNS are similar in humans and some animals. Mora-Bermúdez et al (2016): Cytoarchitecture, cell type composition, and neurogenic gene expression programs are remarkably similar between humans and chimpanzees A large degree of difference between humans and chimps is down to cell numbers and structural sizes This means that brains of some animals function similar to that of humans and can be used to understand brain mechanisms underlying learning in humans. Animals & the study of learning Frans de Waal (2005): "We are apes in every way, from our long arms and tailless bodies to our habits and temperament." For their own sakes/ to understand them better: Studying animals helps psychologists understand animal learning and behavior Helps understand their needs to help improve their wellbeing e.g. studies involving dogs have helped improve their co-existence with humans in a friendly environment and animal studies help zoo keepers to know how to handle them. Raging debate: why do sharks attack humans? Mistaken identity or threat perception ? Animals and the study of learning Cost of research: All research come at a cost in terms of resources and logistics. Using animals instead of humans could be cheaper in this regard. Ethical Reasons: To avoid causing harm to humans through experimentation Certain research procedures involve a significant risk of harm to participants. E.g. testing the effects of a new drug on learning. To avoid causing harm to humans, animals are used as an alternative. Minimal ethical requirements Using animals require less ethical requirements than using humans. Eg. There is no need for informed consent. Animals and the study of learning HAVE A NICE DAY PSYC 337: LEARNING THEORIES OF LEARNING: The Behavioural Theory Dr. Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Explain the behaviorist understanding of learning 2. Familiarize ourselves with the theory of classical conditioning 3. Study Ivan Pavlov’s experiment 4. Understand elements and basic features of classical conditioning Review of lecture 1 Define learning Attributes of learning Relevance of learning Learning, Knowledge and performance Approaches to learning Animals and the study of learning Behavioral Theory of Learning Behavioral learning theory • Behaviourism is one of the earliest and most dominant schools in psychology • Early Behaviorists included: John B. Watson, B.F. Skinner, Edward Thorndike, Ivan Pavlov (google them!) • Behaviorists believe that every behavior is a response to environmental stimuli or events • Thus, behavioral learning theories generally define learning by focusing on observable behaviours and discounting any mental activity. • Learning is defined simply as the acquisition of new behaviour. (Pritchard, 2005: 7) Behavioral learning theory Key behaviorist arguments: Behaviour that is followed by a reinforcing consequence will continue or strengthen. Behaviour that is followed by a punishing consequence will decrease or weaken. Behaviour that is not reinforced will simply disappear Behavioral learning theory The behaviourists’ idea of learning is often called learning by association. Through research (mainly experiments), they demonstrated how organisms learn by forming associations between stimuli, or between a response and its consequences. To the behaviorist: Learning occurs when an organism forms an association between a stimulus, the organism’s response and the consequence of the response. The behaviorist view is represented by two main theories of learning: 1. Classical conditioning 2. Operant/instrumental conditioning Classical Conditioning Classical conditioning Classical conditioning is one of the forms of learning explained by behaviorist theory. This form of learning was accidentally discovered by Russian physiologist & Nobel Laureate Ivan P. Pavlov while studying gastric secretion/digestion in dogs. Ivan Petrovic Pavlov (1849 – 1936) Classical conditioning Pavlov was interested in understanding the role of saliva in digestion. He surgically implanted tubes in the cheeks of his dogs. This allowed him to measure the amount of saliva produced when food was placed in the dog’s mouth. He soon realized that the dogs started salivating to other things, including: The sight of food The sound of rattling dishes His mere presence or that of his colleagues. Classical conditioning • Pavlov concluded that this salivation behaviour was the result of learning and named it the conditioned reflex. • This is defined as: “A learned involuntary response” (Wood, Wood, & Boyd, 2005). • To test this, he set up a series of experiments using bells, tones, buzzers, lights, metronomes, geometric shapes & electric shocks. Pavlov’s Experiment Pavlov’s Experiment Pavlov’s experiment Pavlov’s famous experiment took place at his lab in Leningrad, Russia He paired the sound of a bell to the dog’s meat powder. To begin, he rang a bell, which at first did not elicit any response from the dogs. Immediately after he rang the bell, he placed meat powder on the dog’s tongue, which caused salivation. This sequence was repeated many times. Eventually, the dog began to salivate when it heard the bell alone (without the meat powder!). Classical conditioning So, the dog had learnt something, which is that the sound of the bell implies the arrival of food. In essence, it had formed an association between two stimuli – the bell and the meat powder. It had also responded to both stimuli by salivating, first as a reflex and then as a learned response or conditioned reflex/response. Classical conditioning • • In summary: The key issue in CC is the formation of association between/among stimuli which originally/initially may have nothing in common. occurs through a stimulus-response mechanism when an organism learns to respond to a stimulus in a particular way after that stimulus has been paired with another one over a period of time. Learning here Classical conditioning Wood et al., (2003): “A type of learning through which an organism learns to associate one stimulus with another” Davis & Palladino, (2005): “Learning that occurs when two stimuli – a conditioned stimulus (originally a neutral stimulus) and an unconditioned stimulus – are paired and become associated with each other” Key Elements in Classical Conditioning Elements in Classical Conditioning A stimulus is “any event or object in the environment to which an organism responds” (Wood et al., 2005). In CC, there are three (3) types of stimuli: Unconditioned Stimulus (eg meat) Neutral stimulus (eg. bell that elicits no response) Conditioned stimulus (bell that elicits salivation) and three (3) types of responses: Unconditioned response (salivation at the meat) Neutral/No response (no reaction at sound of bell) Conditioned response(salivation at sound of bell) Classical conditioning Unconditioned Stimulus (UCS) – A stimulus that naturally evokes a particular response (eg. the meat powder). Neutral Stimulus: A stimulus that does not elicit a desired response Conditioned Stimulus (CS) – A previously Neutral Stimulus (NS) that now evokes a particular response after having been paired with an unconditioned stimulus (eg. the bell) over time. Unconditioned Response (UCR) – An unlearned, inborn reaction to an unconditioned stimulus (eg. salivation to the meat powder). Conditioned Response (CR) – A learned response to the CS that occurs after UCS-CS pairing (eg. salivation to the bell). Classical conditioning So classical conditioning actually works this way: Step 1. BEFORE CONDITIONING Food (UCS) = Saliva (UCR) Bell (NS) = No Response (NR) Step 2. DURING CONDITIONING Bell (NS) + Food (UCS) = Saliva Step 3. AFTER CONDITIONING Bell (CS) = Saliva (CR) Importance of Classical Conditioning Classical conditioning Classical conditioning is important because it helps us understand some forms of human behavior It can be applied in various life settings for behavior modification eg. In student behavior management and classroom management in schools It also demonstrates that emotional reactions such as fear can be learnt. This was demonstrated in the Little Albert Experiment by John B. Watson and Rosalie Rayner in 1920. Classical conditioning: Little Albert Loud noises made little Albert cry Fluffy objects however got no response from him Loud clanging sound was paired with fluffy object over time Soon, Albert began to cry on seeing the fluffy object Basic Features of Classical Conditioning Features of Classical Conditioning Acquisition – Process in which organism gradually learns to associate two stimuli and respond to this association. Stimulus Generalization – “Occurrence of responses to stimuli that are similar to a CS” (Davis & Palladino, 2005). Discrimination – “Occurrence of responses only to a specific CS” (Davis & Palladino, 2005). Extinction - “In classical conditioning, the weakening and eventual disappearance of the CR as a result of repeated presentation of the CS without the UCS” (Wood et al., 2005). Spontaneous Recovery – “The reappearance of an extinguished response (in a weaker form) when an organism is exposed to the original CS following a rest period”. This is also known as Reacquisition. Factors influencing classical conditioning Factors influencing CC Some factors can influence the acquisition of classically conditioned response. Five of these are: 1. Sequence of NS-UCS Presentation : – A stronger conditioning occurs when the NS is presented first and remains till the UCS is presented. This sequence is known as forward conditioning. – Alternatively, the UCS could be presented first followed by the NS. This is called backward conditioning and this produces a weaker conditioning. Factors influencing CC 2. – – 3. – – Number and consistency of NS-UCS Pairings Generally, the greater the number of pairings, the stronger the conditioned response (CR). However, in real life events only one pairing is enough to classically condition taste aversion or a strong emotional response to cues associated with some traumatic event (e.g. floods, rape). Strength/Intensity of the UCS If the NS is paired with a very strong UCS, the conditioned response (CR) will be stronger and will be acquired more rapidly. If the NS were paired with a weaker UCS, the Conditioned Response (CR) will be weaker. Factors influencing CC 4. How reliably the NS predicts the UCS – For the association in CC to occur, the NS must reliably predict the occurrence of the UCS, i.e. the CS must be informative in predicting the UCS. 5. The temporal relationship between the NS and the UCS Conditioning takes place fastest if the NS occurs shortly before the UCS Conditioning takes place more slowly or not at all when the two stimuli occur at the same time or far apart in time The ideal time between the presentation of the NS and UCS is about ½ second This varies depending on the type of response being conditioned and the nature and intensity of the CS and UCS. Factors influencing CC NOTE: The temporal relationship between the NS and the UCS and how it affects classical conditioning is known as the Contiguity Theory. The temporal relationship can be manipulated in a number of ways, including: Simultaneous conditioning – This involves the presentation of the NS and UCS together at the same time. So, the onset and offset of the two are the same. There is hardly any conditioning in this process due to overshadowing. – Temporal conditioning – Here, no NS is presented. What rather happens is that the UCS is presented repeatedly with a constant time interval between presentations. Eventually, the organism produces a CR just before each occurrence of the UCS. Thus time becomes the CS. – Trace conditioning – This is the opposite of backward conditioning. Here, the onset and offset of the NS occurs before the UCS is presented. This makes it more difficult for a CR to be formed. If formed at all, the CR is weak. PSYC337: Psychology of Learning Classical & Operant Conditioning Ernest Darkwah (PhD) DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Explain other forms of Classical Conditioning 2. Discuss application of classical conditioning in everyday life settings 3. Develop understanding of operant conditioning as theory of learning 4. Understand elements and basic components of operant conditioning Review of Lecture 2 Explain behavioral learning theory Explain classical conditioning as a learning theory What are some elements in classical conditioning Why is classical conditioning important State five factors that can influence classical conditioning and show how the influence occurs Other forms of classical conditioning Other forms of conditioning Higher-order/ Second-order conditioning: The pairing of a Neutral Stimulus (NS) with a Conditioned Stimulus (CS) in order to turn the NS into a CS eliciting the same response as the CS with which it was paired. the conditioning here occurs not by pairing the NS with a UCS, but by pairing it with a stimulus that has already been conditioned to produce a response. The conditioning process here is extended by one more step UCS Other forms of conditioning • Counter-conditioning: The process of eliminating a CR by pairing the CS with a different UCS for a response that is stronger than the CR and that cannot occur at the same time as the CR. • Also often called desensitization and used for behavior modification • Often used on pets or children to change their attitude or emotional response to a stimulus Other forms of conditioning Aversive Conditioning a form of conditioning in which the subject is simultaneously exposed to a stimulus (particular behavior) and discomfort, as a result of which he starts associating the two and stops the said behavior. Here the idea is to replace a positive response to a harmful stimulus with a negative response Applications of classical conditioning Applications of Classical Conditioning – Behaviour modification 1. In rehabilitation therapy for alcohol and drug addiction Therapists expose patients to alcohol mixed with or paired with a substance that produces discomfort After sometime, patients stay away from alcohol because the smell of it elicits a response of discomfort from their system In drug rehabilitation therapy, individuals develop a craving when they come close to cues (bars, corners, some specific persons etc.) who they associate with the drug. So the therapists treat them by ensuring they stay away from such cues This kind of therapy is called aversion therapy Applications – Behaviour modification • Aversion therapy is a type of behavior therapy in which an aversive stimulus is paired with a harmful or socially undesirable behaviour until the behaviour becomes associated with pain or discomfort, thereby reducing its possibility of recurrence • Some forms of punishment are examples of aversive conditioning Applications – Behaviour modification 2. Bedwetting: • An alarm bell with a pad is attached or put under the child whilst he is asleep. • The bell rings whenever any moisture reaches the pad. The child then wakes up. • A time comes when the child wakes up as soon as his bladder is full. Applications – Behaviour modification 3. Systematic Desensitization – Often a counter-conditioning process A behaviour therapy that is based on classical conditioning and used to treat fears/ phobias. Clients are trained in deep muscle relaxation They are then made to confront a graduated series of anxiety-producing situations (real or imagined) until they can remain relaxed while confronting even the most feared situation.” Applications of classical conditioning Business/ advertising Business/advertisement: Situations and objects (goods and services) are often paired with something or someone attractive and desirable (e.g. models, football stars, actors, e.t.c.) Over time, people respond positively to the product as they would respond to the desirable person or object. The idea is to get people to associate the product with the desirable person and eventually respond positively to the product Applications of CC - Business CELEBRITY SALES Applications of CC -Mood Mood and feelings: You like a particular person or respond positively to him/her Any time you sit in that person’s car, a particular song is playing Over time, you react positively to that song anytime you hear it playing even if that specific person is not there. If, for example, that person dies, Anytime you hear the song you may become moody or sad. Operant Conditioning Learning through consequences Operant conditioning Learning also comes from anticipating/experiencing the consequences of our actions. Imagine that you whistled at a dog, and it attacked you. Would this behavior of whistling be repeated the next time you see a dog? Probably not! This is the basis of the learning theory called Operant Conditioning Operant conditioning is also often known as Instrumental learning or instrumental conditioning Operant conditioning The key argument in operant conditioning is that the organism/ individual is not a passive recipient of stimulus-response processes but rather actively engages/ operates with the environment before learning occurs. In contrast to classical conditioning, the idea in operant conditioning is that the individual’s behavior is governed by the anticipated consequences rather than automatic response elicited by a stimulus. Simply put, an organism first acts (operates) in a way and the consequences of that action determines the change that will occur in the behavior The organism/ individual becomes ‘conditioned by its operation’ Operant conditioning Definitions: Wood et al., (2005): “A type of learning in which the consequences of behaviour are manipulated in order to increase or decrease the frequency of an existing response or to shape an entirely new response” Skinner (1937): “Behaviour controlled by its consequences” Staddon, (2003): In practice, operant conditioning is the study of reversible behavior maintained by reinforcement schedules. Operant Conditioning is credited to the works of two American behaviorists Edward L. Thorndike and B. F. Skinner. Burrhus Frederick Skinner (1904 – 1990) Edward Lee Thorndike (1874 – 1949) Operant conditioning Thorndike believed that trialand-error learning is the basis of most behavioural changes. Wood et al., (2005): Trial-and-error learning occurs when a response is associated with a successful solution to a problem after a number of unsuccessful responses.” Operant conditioning Thorndike came to this conclusion through numerous experiments. His best-known experiment is the one in which he placed hungry cats in wooden boxes fastened closed with a latch This became famously known as the puzzle box experiment The puzzle box Experiment The puzzle box experiment He placed hungry cat in a wooden box fastened with a latch He placed food right outside the door The cat had to open the door to get the food He observed: The cats paced around and scratched the walls trying to get to the food The puzzle box experiment The cat performed all sorts of actions until it accidentally stepped on the latch and the door opened Thorndike repeated this routine several times Eventually, as soon as the cat was placed in the box, it would go straight to the latch and step on it to open the door Thorndike concluded that the other responses/ behaviours (pacing and scratching) which did not help open the door were gradually dropped (weakened and disappeared) by the cat Only the response/ behavior(stepping on the latch) that led to opening the door was repeated and strengthened The puzzle box experiment Thorndike called the behaviour/response which the cat repeated the Instrumental Response. This is because it is instrumental in producing reinforcement (i.e. the food reward) Thus operant conditioning is sometimes referred to as Instrumental conditioning because it emphasizes that behaviours that are instrumental in achieving reinforcement are the ones that are learnt. Operant Conditioning Based on the numerous experiments, Thorndike formulated three (3) laws of learning: 1. The Law of Effect – “The consequence, or effect, of a response/behaviour will determine whether that response or behaviour will be repeated under similar circumstances in the future. In essence, the law states that responses closely followed by pleasant consequences are strengthened while those followed by unpleasant consequences are weakened. Operant Conditioning 2. The Law of Exercise – This law states that repeated practice of a stimulus-response association is strengthened. In effect, practice makes perfect. Thorndike later retracted this statement, arguing that pure exercise or practice alone did not have a benefit only rewarded exercises produced learning. In effect, practice with feedback makes perfect (or produces learning). Operant Conditioning 3. The Law of Readiness – This law states that an individual learns better if the individual is physically and psychologically prepared. Thorndike believed that readiness is an important condition of learning because satisfaction or frustration depends on an individual’s state of readiness. E.g. when a person is hungry, sleepy etc, this will affect learning. Operant conditioning The Skinner Box The Skinner Box Thordike’s work served as the basis for Skinner’s experiments Like Watson, he believed that the causes of behaviour are in the environment. Even our thoughts, feelings, or perceptions are shaped and determined by environmental forces. The Skinner Box For his own experiments, Skinner designed an apparatus which is now commonly known as the Skinner box. The Skinner box is a soundproof chamber typically equipped with a lever/bar and a dispenser. So the animal has to press the lever to get food or water from a dispenser. The Skinner Box SKINNER BOX Speaker Pellet dispenser Signal lights Lever Dispenser tube Food cup Electric grid To shock generator The skinner box The Skinner box was a much improved apparatus than the puzzle box It allowed the experimenter to manipulate the experimental situation to test various learning outcomes such as : ratio of responses to food deliveries the time interval between responses that would produce food. The skinner box Skinner also invented a device called a cumulative recorder. The cumulative recorder is attached to the Skinner box and automatically logs the animal’s responses (i.e. bar pressing). The results sheet, known as a cumulative record, shows the rate of responding in a series of Operant Conditioning trials. The skinner box Operant Conditioning In the Skinner box, the animal put inside is conditioned to press the lever to get food through the process of shaping. (Wood et al., 2005): Shrestha (2017): “Shaping is an operant conditioning procedure that involves reinforcing behaviors that are closer to the target behavior in order to gradually get the subject to perform the target behaviour In other words, shaping involves successive approximations: The step-by-step procedure of reinforcing different behaviors (that are close to the ultimate behaviour) until the ultimate behavior is achieved. Eg. Clapping for a child who takes one step, clapping more when he takes 2 steps and continuing until the child finally learns to walk. Reading • Follow the link below to read a chapter on operant conditioning: https://pdfs.semanticscholar.org/c872/4a12fb c671366ec3b09ac3bfd94da1f60183.pdf HAVE A NICE DAY Psyc 337: Psychology of Learning Operant Conditioning Basic Components Dr. Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Discuss some basic components of Operant conditioning: Reinforcement and punishment 2. Discuss the various forms of reinforcement and punishment 3. Develop understanding of some factors that can influence operant conditioning Basic components of operant conditioning Operant conditioning Operant Conditioning has 1 key concept: Reinforcement. To understand its basic components, it is necessary to understand this concept of reinforcement: Wood et al., (2005): “Reinforcement is any event that follows a response and strengthens or increases the probability that the response will be repeated” Reinforcement can strengthen both desirable and undesirable social behaviour Operant conditioning In order for reinforcement to occur, there is the need for a reinforcer: A reinforcer is anything that follows a response and strengthens it or increases the probability that it will occur again (Wood et al., 2005). Reinforcers fall into 2 broad categories: primary reinforcer: A reinforcer that fulfills a basic physical need for survival and does not depend on learning. Eg. food Secondary reinforcer – “A reinforcer that is acquired or learned through association with primary reinforcers. Eg. Money Secondary reinforcers gain their reinforcement power because they can help to acquire a primary reinforcer Operant conditioning Reinforcement can be positive or negative Positive reinforcement Any pleasant or desirable consequence that follows a response and increases the probability that the response will be repeated. Negative reinforcement “The termination of an unpleasant condition after a response, which increases the probability that the response will be repeated.” Operant conditioning Reinforcement can be used in 2 broad ways: continuously or partially Continuous Reinforcement Reinforcement that is administered after every desired or correct response. It is the most effective method of conditioning a new response. Partial reinforcement A pattern of reinforcement in which some but not all correct responses are reinforced. Schedules of Reinforcement Operant conditioning Partial reinforcement can be administered according to a schedule. This is often called Schedules of reinforcement Schedules of reinforcement can be fixed or variable Fixed reinforcement means that the reinforcement is done in a fixed manner. Variable reinforcement means that the manner in which the reinforcement is done can vary. There are two types of fixed reinforcement schedules And there are two types of variable reinforcement schedules: Operant conditioning Therefore in total schedules of reinforcement come in 4 basic types: 1. Fixed-ratio schedule – In this schedule a reinforcer is given after a fixed number of correct responses/behaviours.” E.g.: An FR8 schedule means that reinforcement will be given after every 8 correct responses. Operant conditioning Fixed-interval schedule – In this schedule, a reinforcer is given after a fixed time interval eg. giving a break after every two hours of lecture. E.g.: An FI15 schedule means that reinforcement is given after 15 minutes or 15 hours or 15 days, depending on whatever time frame is being used. Operant conditioning Variable-ratio schedule – A schedule in which the number of responses that has to occur before reinforcement is given can vary. That is, a reinforcer is given after a varying number of responses, based on an average ratio Eg. A VR15 schedule means that an average of 15 responses are required for 1 reinforcer but reinforcement can occur for 10, 20 or 45 responses. Operant conditioning Variable-interval schedule – In this schedule the time interval within which reinforcement is given for a correct response can vary. E.g.: A VI90 schedule means that on average a reinforcement can be given after 90 seconds (or minutes/hours) but reinforcement can also occur after 45, 120, 75, or 105 seconds. Basic Features of Operant Conditioning Features of operant conditioning Like Classical conditioning, operant conditioning also has some basic features These features are identical to those of classical conditioning The features in both learning theories explain how learning can occur and disappear Features of operant conditioning The features include: 1. Stimulus Generalization – The tendency for similar stimuli to elicit the same response (Lahey, 2005). It occurs when the subject/individual reacts the same way to one stimulus and another stimulus that looks like the first stimulus 2. Stimulus Discrimination – The tendency for responses to occur more often in the presence of one stimulus than others” (Lahey, 2003). It involves the ability to distinguish between one stimulus and another stimulus that looks similar Application – Behaviour modification 3. Extinction – In operant conditioning, the weakening and eventual disappearance of the conditioned response as a result of the withholding of reinforcement (Wood et al., 2005). 4. Spontaneous recovery: This can also occur in operant conditioning A rat whose bar pressing has been extinguished may press the bar again a few times when returned to the Skinner box. Operant conditioning vs classical conditioning Feature Classical conditioning Operant Conditioning Acquisition Through associating of events (CS signals the coming of UCS) Through associating a behavior and its consequence Response Involuntary (reflex) Voluntary (operates on the environment) Role of the learner Passive (only responds to stimuli) Active (initiates an action and learns from consequence) Extinction The CR decreases when CS is repeatedly presented without UCS Responding decreases when reinforcement stops Cognitive process Organisms develop an expectation that the CS signals the coming of UCS Organisms develop an expectation that some behaviours will be reinforced and others will be punished. Factors influencing operant conditioning Operant conditioning 1. The Magnitude of Reinforcement As the magnitude of reinforcement increases, acquisition of a response is faster, rate of responding is higher, and resistance to extinction is greater. E.g.: When drug addicts are given cash incentives to abstain from taking drugs, they are likely to do so when the amount is great. Operant conditioning 2. The Immediacy of Reinforcement When reinforcement is immediate, responses are conditioned more effectively. The longer the delay in reinforcement, the slower the acquisition of a response. E.g.: Little learning occurs in animals with delay of reinforcement . In humans, delayed reinforcement is no match for immediate reinforcement in producing learning. Operant conditioning 3. The Level of Motivation of the Learner A highly motivated learner practices more and therefore learns faster. E.g.: Skinner used rats that had had no food for 24 hours pigeons that were maintained at 75-80% of their normal body weight to maximize motivation in his experiments. Punishment Punishment Punishment Another common type of consequence to behaviour is punishment. According to Wood et al. (2005), this is defined as: It refers to the removal of a pleasant stimulus or the application of an unpleasant stimulus, in order to reduce the probability of a behavior occurring again. It is the opposite of reinforcement. Punishment Like reinforcement, punishment can also be positive or negative: Positive punishment Here a response/behavior is followed by the presentation of an unpleasant stimulus to decrease the occurrence of the response. Negative punishment Here, a response is followed by the removal of a pleasant stimulus to decrease the occurrence of the response. Punishment 1. 2. 1. Due to its nature, punishment can have some serious disadvantages: Punishment indicates that a behaviour is inappropriate but does not necessarily help people develop appropriate behaviours. The punished individual often becomes fearful and angry/hostile towards the punisher instead of respectful and understanding The punished individual might want to retaliate or at least avoid or escape from the punisher and the punishing situation. Punishment 4. Punishment frequently leads to aggression as those who administer physical punishment may become models of aggressive behaviour. By demonstrating aggression as a way of solving problems and discharging anger, they teach children especially, that it is a good way to solve problems. Punishment Alternatives to punishment Remove the rewarding consequences of undesirable behaviour. Rather, give attention to more appropriate behaviours. Use positive reinforcement to make good behaviour more rewarding. Punishment Making Punishment Effective Punishment can be useful in certain instances if we ensure that it is effective. Research has shown that 3 factors influence its effectiveness: 1. Timing/immediacy Punishment must be applied during the problem behaviour or as soon as possible afterwards. The longer the delay, the less effective the punishment is. Punishment 2. Intensity/severity Ideally, the intensity of punishment should match the seriousness of the problem behaviour. 3. Consistency Punishment must be applied consistently for it to be effective. Ignoring the problem behaviour one day and punishing it the next day will produce little or no results. Psyc 337: Psychology of Learning Operant Conditioning: Dr. Application Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Demonstrate how Reinforcement compares to punishment 2. Demonstrate instances in real life where operant conditioning can be applied Test questions Explain how learning occurs through classical conditioning Explain how the association between the NS and the UCS be made stronger in classical conditioning Explain how classical conditioning can be applied in one real life circumstance Reinforcement vs Punishment Punishment vs Reinforcement Punishment and reinforcement are two ways through which behaviourists believe learning occurs These two concepts have some notable differences and similarities. For eg. Punishment can be positive or negative and so can reinforcement However positive and negative punishment are used for purposes that are different and opposite to positive and negative reinforcement Reinforcement vs Punishment Punishment and Reinforcement When we use reinforcement and punishment continuously, certain cues become associated with them So the organism learns what each cue signals. Such a cue is known as a discriminative stimulus A discriminative stimulus is a stimulus that signals whether a certain response or behaviour is likely to be rewarded, ignored, or punished Punishment and Reinforcement Reinforcement and punishment have the power to generate 3 kinds of learning in both animals and humans: 1. Escape learning Learning to perform a behaviour because it prevents or terminates an aversive event. This reflects the power of negative reinforcement. 2. Avoidance learning – Learning to avoid events or conditions associated with aversive consequences or phobias. This depends on two types of conditioning, classical and operant. Punishment and Reinforcement 3. Learned helplessness A passive resignation to aversive conditions that is learned through repeated exposure to inescapable or unavoidable aversive events. The initial experiment on learned helplessness was conducted by Overmier and Seligman (1967) using dogs. It’s synonymous to giving up : when an organism begins to accept that there is no way to avoid or escape an aversive event or situation Applications of Operant Conditioning Applying Operant conditioning 1. Like Classical conditioning, operant conditioning principles can be applied in real life situations in many ways: Animal training To get an animal to perform a trick, the trainer first trains it to perform a simple act that is similar to its natural behaviour and then gradually shapes the animal to perform more complex behaviours. Operant conditioning 2. Biofeedback – The use of sensitive equipment to give people precise feedback about internal physiological processes so that they can learn, with practice, to exercise control over them Used to regulate heart rate, control asthma, migraines/tension headaches, gastrointestinal disorders, stroke, sexual dysfunctions e.t.c. Operant conditioning 3. Breaking bad habits One can learn to conquer bad habits by means of reinforcement, using a simple 3-step method (Azrin & Nunn, 1973 cited in Kalat, 2002): 1. Become more aware of your bad habit by isolating it from the chain of normal activities. Then imagine the habit in association with something repulsive. 2. Provide your own reinforcement for not engaging in the bad habit. For this to work you need to choose a reinforcer that you find very rewarding and use scheduling. 3. Do something incompatible with the bad habit. Operant conditioning 4. Behaviour modification: A method of changing behaviour through a systematic program based on the learning principles of classical conditioning, operant conditioning, or observational learning Also known as Applied Behaviour Analysis, it’s often used by institutions such as schools, prisons, and mental hospitals. Operant conditioning In schools, for example, there are 3 important uses of Applied Behaviour Analysis or behaviour modification. These include: 1. 2. 3. Increasing desirable behaviour. Using prompts and shaping. Decreasing undesirable behaviour. Operant conditioning 1. Increasing desirable behaviour. This requires the use of 5 Operant Conditioning strategies, including: A. B. Choosing Effective Reinforcers – This can be done by finding out about a student’s reinforcement history, wants that are not frequently gotten, and perception of the reinforcer’s value. Making the Reinforcement Contingent and Timely – The student must perform the behaviour to get a reward and must be rewarded immediately afterwards. Operant conditioning c. Using the best Schedule of Reinforcement – Start with continuous reinforcement so the behaviour is learnt rapidly then use partial reinforcement which works better to maintain the behaviour. d. Contracting – This involves putting reinforcement contingencies in writing. Simply, it is a written agreement between the teacher and student with input from both of them. A contract should have “if…then” statements, be signed and dated by both teacher and student, and witnessed by another student. Operant conditioning e. Using Negative Reinforcement effectively – Negative reinforcement means removing unpleasant stimuli to increase behaviour. Operant conditioning 2. Using Prompts and Shaping A prompt works on the principle of discrimination. It is defined as: “an added stimulus or cue that is given just before a response and increases the likelihood that the response will occur” (Santrock, 2001). Prompts can be verbal (e.g. instructions, hints, notices) or visual (e.g. accepted signs for ‘keep quiet’ or ‘speak louder’). Operant conditioning 3. Decreasing Undesirable Behaviour Here, Applied Behaviour Analysts suggest that teachers should do the following: Use differential reinforcement – The teacher reinforces behaviour that is appropriate or incompatible with what the child is doing. E.g.: Praising a child for using the right hand to call the teacher’s attention and not the left hand. Operant conditioning Terminate reinforcement – This involves withdrawing positive reinforcement from a child’s inappropriate behaviour. Remove desirable stimuli – This involves 2 strategies i.e. time-out (taking the student away from positive reinforcement) and response cost (taking a positive reinforcer away from a student). Present aversive stimuli – The most common types of aversive stimuli used by teachers are verbal reprimands. This is most effective when the teacher is near the student and when it is used with a nonverbal reprimand (e.g. a frown). Operant conditioning Application of Operant Conditioning in Business Raffles and Draws are often based on operant conditioning Eg. Scratch and win promotions, lotteries etc. Psyc 337: Psychology of Learning Social/Observational Learning Theory Dr. Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Explain Social learning as a theory of learning 2. Discuss observational learning as a type of social learning 3. Discuss Bandura’s experiment into observational learning 4. Discuss processes involved in observational learning Social Learning Theory: Learning from others Social learning Like classical and operant conditioning theories, social learning also follows behaviourist traditions and beliefs It is based on the belief that behavior change (learning) is orchestrated by the environment The main argument in this theory is that individuals learn through their interactions with others within their social context Social learning theory The theory was propounded by Canadian-American Psychologist Prof. Emeritus Albert Bandura Bandura felt that previous theories (classical & operant conditioning) did not provide sufficient explanation of learning Albert Bandura He argued that these theories do not explain how a child acquires new behaviours simply by watching and copying others Social learning theory Badura believed that sometimes we learn new behaviours simply by watching others and copying them. Thus, the social environment is the key factor behind learning and not just simply stimulus associations. Badura’s theory is often seen as a bridge between learning theories and cognitive theories because it emphasizes attention, memory and motivation. An expansion of this theory by Bandura himself, resulted in the creation of the Social-Cognitive Theory Social learning theory Think of how you learnt to dance azonto? You probably saw another person making the moves and copied the basic moves by observing carefully. According to Bandura, a child does not have to be rewarded herself before learning a behaviour. Just seeing someone else being rewarded for a behaviour is enough for the child to want to learn that behaviour This type of learning where individuals watch and imitate other people’s behaviours is what Bandura called Observational learning. Observational Learning: Learning from how others do it Observational Learning Observational Learning is defined as: Learning by observing the behaviour of others and the consequences of that behaviour; In other words, observational learning is learning by imitation. It is also often known as modeling. Observational learning can also be vicarious. Vicarious learning occurs when individuals observe the behaviours of others and learn from the consequences of those behaviours. Observational Learning In Observational learning: The individual who demonstrates a behaviour or whose behaviour is imitated is referred to as a model: The effectiveness of a model is related to his/her status, competence, and power. The age, sex, attractiveness, and ethnicity of the model are also important factors for modelling to occur Observational Learning To illustrate how observational learning occurs, Bandura performed several classic experiments. The famous one is the Bobo Doll experiment. It was meant to test the effects of observational learning on children’s aggressive behaviour. The premise was that watching TV programs depicting aggression and violence, even cartoons, taught children to be aggressive. Observational Learning Group 1 – Children individually observed an adult model punching, kicking, and hitting a 5foot, inflated plastic Bobo doll with a mallet, while uttering aggressive phrases. Group 2 – Children observed a nonaggressive model who ignored the Bobo doll and sat quietly assembling Tinker Toys. Control Group – Children were placed in the same setting with no adult present. Later each child was observed through a oneway mirror. Observational Learning Results showed that: Children exposed to the aggressive model imitated much of the model’s behaviour. They also engaged in significantly more non-imitative aggression. Those who observed the nonaggressive model showed less aggressive behaviour than the control group. Observational Learning Observational Learning Observational Learning Another study compared the degree of aggression in children following 3 different exposures: An aggressive model in a live situation. A filmed version of the same situation. A film depicting an aggressive cartoon character using the same aggressive behaviours in a fantasy-like setting. The Control Group had no treatment. Observational Learning Results showed that: Compared to the control group, children exposed to the aggressive models used significantly more aggression. Of the 3 experimental conditions, exposure to humans on film portraying aggression was the most influential in eliciting and shaping aggressive behaviour. Observational Learning These experiments point to 2 important facts: There is a distinction between learning and performance: A child might not make a response after observing a behaviour but may still have acquired the modeled response in a cognitive form. Observational learning occurs whether it is reinforced or not – Bandura believes that reinforcement is not always necessary for observational learning to take place. Observational Learning However, whether learned behaviour will actually be performed depends largely on whether the observed models are rewarded or punished: Vicarious reinforcement – Observed reinforcement of the behaviour of a model, which also increases the probability of the same behaviour in the observer. Vicarious punishment – Observed punishment of the behaviour of a model, which also decreases the probability of the same behaviour in the observer. Observational Learning Critics argued that the experiment: Was unethical and morally wrong as the children were trained to be aggressive. Possibly had long-term effects on the children. Manipulated the children to respond to the aggressive model. Only showed the children playing, not aggressing. Seems artificial. Is flawed because viewing violence on TV rather leads to a decrease in aggression (Catharsis Effect) [Feshbach & Singer, 1971]. Observational Learning According to Bandura (1977; 1986), observational learning is not a simple automatic reflex-like reaction to models. is rather a chain of events that involves 4 key processes including: 1. Attention 2. Retention 3. Motor reproduction 4. Motivation It Observational Learning 1. Attention One must attend to what a model is doing or saying in order to imitate him or her. The observer pays attention to the model’s behaviour and the consequences of that behavior. By paying attention s/he perceives the most critical features of the model that s/he wants to imitate. Attention paid to the model depends on factors such as the model’s attractiveness, engaging personal qualities, prestige, his/her age, race, sex, religious beliefs, political attitudes, and general similarity to the observer Observational Learning 2. Encoding One must encode what is seen or heard and retrieve it later. The observer creates internal images or linguistic descriptions of the model’s actions, in order for the behaviour to be retained. If there is no retention the observer will not remember the behaviour, and learning will not take place. The easier it is for a viewer to create such mental representations, the better the behaviour will be learned and remembered. Observational Learning 3. Motor Production One must practice to perfect the steps in reproducing a behaviour. Attention and retention are necessary conditions but the observer must also have the motor ability to reproduce the behaviour that is being modeled. S/he should be able to reproduce some approximation of the model’s movements. Otherwise there will be no learning. Practice helps improve motor performance. Observational Learning Motivation This final process involves being motivated to learn and carry out the behaviour that has been reproduced. Motivational factors, that is reinforcement, ensures that the modeled behaviour will be performed. Performance will depend on an observer’s expectation for reinforcement either directly or vicariously. The motivation to imitate and act depends in good part on the consequence that befalls a model. One is more likely to imitate a model’s actions if s/he is rewarded or reinforced, than if they are punished. Modes of Observational Learning Observational Learning There are 4 ways through which people learn from observation (Wood et al., 2005): 1. Modeling Effect 2. Elicitation Effect 3. Inhibitory Effect 4. Disinhibitory Effect Observational Learning Modelling Effect The modeling effect refers to learning a new behaviour from a model through the acquisition of new responses. So, learning how to solve math problems, for example, is done through the modeling effect. So is learning how to cook, wash, drive. Observational Learning Elicitation effect The elicitation effect refers to exhibiting a behaviour similar to that shown by a model in an unfamiliar situation. Sometimes, you already have some skill but then find that the skill is not adequate to deal with a much more complex situation. In such an instance, you might have to watch what someone much more skilled than you does so you copy. Observational Learning Inhibitory Effect The inhibitory effect refers to suppressing a behaviour because a model is punished for displaying the behaviour. This is the kind of observational learning we are displaying when we slow down upon seeing another driver receiving a ticket. When school children see a classmate punished for misbehaving, the experience has a tendency to suppress that behaviour in all of them. Observational Learning Disinhibitory Effect The disinhibitory effect refers to displaying a previously suppressed behaviour because a model does so without receiving punishment. For example, adolescents may lose whatever resistance they have to drinking, drug use, or sexual activity. Especially when they see or hear about peers or characters in movies or TV shows engaging in these behaviours without experiencing any adverse consequences. Application of Observational Learning Observational Learning Parenting – children are likely to copy all behaviours modelled by parents. Workplace – For example, apprenticeship, medical students (surgery), pilots, training programs in organizations. Media and Learning – educational videos, computers, toys (effects could be positive or negative so care must be taken). Observational Learning Treatment of phobias – Observing people play with a feared animal will make someone with a phobia for the animal more likely to approach it: For example, in a study, children with dog phobias were able to lose their fear by watching another child called Fearless Peer repeatedly walk up to a dog, touch it, pet it and eventually play actively with it (Bandura, Grusec, & Menlove, 1967). Observational Learning Therapy – A therapist can model appropriate behaviour and thereby teach it to a client deficient in such skills. Self-regulation – “Rewarding or punishing one’s own behaviour” (Slavin, 2006): Self-regulation strategies can be used by students to monitor and regulate their own behaviour so that it becomes a habit. HAVE A NICE DAY Psyc 337: Psychology of Learning Cognitive Learning Theory Dr. Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Explain Cognitive learning as a theory of learning 2. Discuss Cognitive information processing model 3. 4. Discuss Tolman’s experiment on cognitive learning Discuss the concept of cognitive maps Cognitive Learning Theory: Learning through thinking Cognitive learning Theory classical and operant conditioning theories explain learning as stimulus-response/ consequence mechanisms Observational learning simply argues that we learn by watching and imitating Some psychologists argue that although these positions are true, almost all learning processes including conditioning processes involve some form of mental processing. Cognitive learning Theory These mental processes may include mental images, perceptions, expectations. Eg. The association between the NS and UCS in classical conditioning is developed through the organism’s expectation that a particular NS will be followed by a particular UCS That is, the organism mentally links the two objects which leads to a particular response Over time, this mental association becomes automatic in the individual/ organmism Cognitive learning Theory Simply put, individuals actively cognitively process environmental events and the outcome of this cognitive/mental processing determine the learning that takes place This is the foundation argument of the Cognitive Learning Theory. Cognitive learning Theory According to the Cognitive learning theory: It is not enough to say that people make responses because there is an assumed link between a stimulus and a response… or Due to a past history of reinforcement for a response. Instead people and even animals develop an expectation that they will receive a reinforcer upon making a response. Cognitive learning Theory Cognitive theorists therefore insist that the study of learning should include the study of cognitive processes. Cognitive processes refer to mental processes such as thinking, knowing, problem solving, remembering, and forming mental representations. Cognitive learning is therefore the study of the mental processes that underlie the whole learning process. Cognitive learning Theory There are 3 instances of cognitive learning: Place Learning Latent Learning Insight Learning Cognitive learning Theory 1. Place Learning This concept is credited to the work of Edward C. Tolman (1886-1959). He developed this theory of learning which combines the advantages of stimulus-response theories and cognitive theories. He used mazes in his experiments (Tolman, 1946) and the subjects were rats. Edward Chance Tolman (1886 - 1959 Cognitive learning Tolman’s Experiment : • The experiment was to demonstrate how people learn about places • He placed rats in a maze and observed how the rats came to learn their way out to reach food Rats in a Maze Cognitive learning Theory Based on his findings, Tolman believed that: The rats had learned a cognitive map of where the food was located relative to the starting point. A cognitive map refers to: “a mental representation of a spatial arrangement such as a maze” (Wood et al., 2005). Cognitive learning Theory 2. Latent Learning “Learning that occurs without apparent reinforcement and is not demonstrated until the organism is motivated to do so” (Wood et al., 2005). To support this position, Tolman and Honzik (1930) conducted a classic experiment. Cognitive learning Theory To demonstrate latent learning, Tolman and Honzik(1930) conducted a classic experiment: One group of Rats were placed in mazes to run and were rewarded with food Another group were placed in the maze and run unrewarded Group two were observed to be very slow. Later rewards were introduced to group 2 They run faster immediately and even became faster than group one. Cognitive learning Theory From this experiment Tolman concluded that: the rats had learned to form a cognitive map. They only showed evidence of this after being given a reason to do so through reinforcement. This was referred to as Latent Learning: Meaning learning that occurs in the absence of an obvious reward. (Hidden Learning) Cognitive learning Theory 3. Insight Learning This concept is credited to the work of a German Gestalt theorist by name Wolfgang Köhler (1887 – 1967). It is a form of cognitive learning that involves sudden recognition of previously unseen relationships. It is also known as Discovery Learning. Köhler developed this theory in the 1940s based on his numerous experiments using a chimpanzee named Sultan. Wolfgang Köhler (1887 – 1967). Cognitive learning Theory Kohler’s Experiment Cognitive learning Theory According to Köhler the chimpanzee learned because of a cognitive change, a new insight that it had developed about the problem. Wood et al., (2005): Insight refers to “the sudden realization of the relationship between two elements in a problem situation, which makes the solution apparent.” Köhler’s insight learning received a lot of criticisms from other psychologists, even some cognitive theorists. Cognitive learning Theory The critics argued that insight learning results only after a “mental trial-and-error” process which involves the following steps: Envisage a course of action. Mentally simulate its results. Compare it with the imagined outcome of the other alternatives. Then settle on the course of action most likely to aid complex problem solving and decision-making (Klein, 1993). Cognitive Learning: Applications Cognitive learning Theory Cognitive Learning: Applications Cognitive learning Theory Examples of cognitive therapies include: Cognitive Restructuring – Assumes that a person’s way of perceiving the world and his/her self-defeating behaviours are as a result of faulty/maladaptive assumptions or irrational beliefs E.g.: I must be loved and approved of by everyone whose love and approval I seek. The focuses of CR is to change these. Cognitive learning Theory Rational-Emotive Therapy – Developed by Albert Ellis, it attempts to restructure a person’s belief system into a more realistic, rational and logical set of views. Rational-Emotive therapists openly challenge patterns of thoughts that appear to be dysfunctional. E.g.: How does failing an exam mean that you are no good? Cognitive-Beahviour therapy - Devised by Aaron Beck, its basic goal is changing people’s logical thoughts about themselves and the world. Beck believed that irrational thoughts and faulty assumptions can lead to emotional disorders. Cognitive Therapy has been successful in treating depression. Read: 15 styles of cognitive distortions HAVE A NICE DAY Psyc 337: Psychology of Learning VERBAL LEARNING Dr. Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Explain Verbal learning as a theory of learning 2. Discuss types of Verbal Learning VERBAL LEARNING Verbal learning Theory If you had a list of hundred words to memorize and reproduce later, how would you go about it? So far, the learning theories we have discussed explain how we learn behaviours in general Some other learning theories such as verbal learning theory specifically explains how we learn verbal material or words. Verbal learning Theory Verbal learning is the process of acquiring, retaining, and recalling of verbal material. At its most basic level, it can be defined as a process of building associations between a stimulus and a response, with both of them being verbal. At a broader level, verbal learning includes the processes of organizing the stimulus material by the learner and the related changes in the learner’s behavior. Verbal learning Theory In simple terms, Verbal Learning is commonly used to describe the memorization and retention of lists of words. It is concerned with what happens when we learn word sequences, word combinations and word contexts. It emphasizes the acquisition and retention of such items, to describe the basic conditions underlying the learning. Verbal learning Theory In essence, verbal learning draws on both the Behavioural and Cognitive perspectives: Behavioural perspective – involves the use of stimulus and response, association learning. Cognitive perspective – involves some rehearsal, elaboration, and mental imagery. Verbal learning Theory Verbal Learning theory is often attributed to the work of German Psychologist Herman Ebbinghaus in the 1880s He conducted a remarkable series of experiments using himself as the subject. The procedure involved learning a list of words in sequence until he could remember them very well. Ebbinghaus in the 1850-1909 Verbal learning Theory In his initial experiment, Ebbinghaus used words made of three-letter syllables that he referred to as “nonsense syllables”. A “Nonsense Syllable” is a collection of letters that have no obvious meaning. A typical nonsense syllable is a three-letter consonant-vowel-consonant combination to form a word. This is called a TRIAGRAM e.g. JEK, MOR, MEZ, etc. VERBAL LEARNING PROCEDURES Verbal Learning Procedures Verbal learning procedures include the following: Serial learning Free recall Paired associate learning Verbal Discrimination Verbal Learning Procedures 1. Serial Learning: Here, a list of words is learned and reproduced in the order or sequence in which they occur on the list. A typical example is the learning of a password In other examples: one may be asked to learn and recall: The English Alphabets or a list of months of the year. Nonsense syllables. Verbal Learning Procedures Glanzer and Dolinsky (1965): There are 2 common methods in serial learning. 1. Serial Recall – The learner is instructed to reproduce the entire list after each presentation. So the learner repeats the items in same order as it was presented. the Verbal Learning Procedures 2. Serial Anticipation – The learner is instructed to name the next item before it appears. So the first item is presented, then time is given for the learner to anticipate what the following item will be. A–C–E- Verbal Learning Procedures Measuring Serial Learning: In serial learning, lists of words are presented for participants to learn in what is called study trials Study trials are also known as presentation trials. This is alternated with test trials where the participants attempt to recall the lists. Learning is then measured by: 1. counting correctly recalled items at each serial position. Verbal Learning Procedures 2. 3. Counting the number of errors made. Checking the speed of recall or performance. Serial learning can be affected by the position of each item within the list. It has been found that the first and the last items are learned quicker and with fewer errors, than the middle items. Verbal Learning Procedures This phenomenon is known as the serial position effect. The Serial Position Effect is the theory that the position of an item in a list has the tendency to affect recall of that item. This is often described by 2 principles: Primacy effect: Enhanced recall of the first items in the list. Recency effect: Enhanced recall of the last items in the list. Verbal Learning Procedures These principles can be represented by a bow-shaped or U-shaped curve when plotted on a graph. This curve can also be inverted. Verbal Learning Procedures Verbal Learning Procedures No. of Errors The Serial Position Effect 9 8 7 6 5 4 3 2 1 0 No. of Errors 0 2 4 6 Serial Position of the Item 8 10 Verbal Learning Procedures 2. Free Recall: In free recall, the recall of a list of words learned is free. It means that the learner has the freedom to recall the items that had been presented earlier in the study trial in any order in the test trial. The ordering/sequence of the items is therefore unimportant. Verbal Learning Procedures In a free recall situation, the learner tends to group the items to be recalled. This is done even if there is no obvious basis for categorization. This aids rapid learning than when items are not categorized. Even though recall can be done in any order, the serial position effect (primacy & recency) can also occur here. Verbal Learning Procedures 3. Paired-Associate Learning: Mary Whiton Calkins was the psychologist who described this method of verbal learning in the 1890s. She was a student of William James. In this form of learning, two items labeled stimulus and response (S-R), are presented for study. One had to learn the correspondence between them. Mary Whiton Calkins 1863-1930 Verbal Learning Procedures Paired –associate learning is often used to understand how people encode and retrieve newly formed associations among stimuli. In a typical study using paired-associate learning, people are asked to learn unrelated word pairs (e.g., stove – letter). At a later time point, memory for those pairs is typically tested by having them either recall one of the words in response to the word it was paired with during encoding Verbal Learning Procedures Paired-Associate Learning Stimulus Response Azumah Experiment Appiah Kaneshie Table knock UTAG FUSSAG Alarm Bag Verbal Learning Procedures Test Yourself: Stimulus Azumah Appiah Table UTAG Alarm Response Experiment Kaneshie Knock FUSSAG Bag Verbal Learning Procedures 4. Verbal Discrimination: This is simply discriminating along some dimensions of words as stimuli. Verbal discrimination procedures include: Simultaneous discrimination – This is where two verbal items are presented and the learner chooses one of them by naming it or pointing at it. The learner is then told whether or not the choice is correct. Eg. In a multiple choice test. Verbal Learning Procedures Successive discrimination – A learner might be given items one at a time and be instructed to respond ‘yes’ or ‘no’ to each item. Alternatively, the learner might be instructed to sort a deck of cards with verbal items printed on them into two or more piles. eg,. Table Kaneshie Bag Knock Verbal Learning Procedures Visual Search : This type is said to occur in a situation where someone is instructed to find verbal items in a list or a text. Eg. Searching your grade in a grade list One actually uses the eyes in the search. Experiments in visual search differ in the sense that they are usually concerned with speed and accuracy rather than with the acquisition or control of stimulus items. Verbal Learning Procedures Verbal Recognition This is a special type where the discrimination is between new and old items. The learner is given an initial list to study in the study trial. Later s/he is given another list with both new items and items from the initial list. Then s/he is asked to identify or recognize the items from the initial list by pointing at, naming, or underlining them. VERBAL LEARNING APPLICATION Verbal Learning Application The application of verbal learning is through Mnemonics. Mnemonic devices are various schemes, strategies, or procedures used to aid encoding and retrieval of verbal items. A simple example is using the first letters of a list of words/items to form an acronym. Mnemonics work because there is a list of cues that the to-be-recalled items are associated with during study and that can be used to guide retrieval. Verbal Learning Application There are various types, including the: Keyword Mnemonic – This was first developed to assist learning foreign language vocabulary. It is when a person uses what a word sounds like to visualize something memorable that will help them later recall the meaning of that word Narrative-chaining Method – This refers to connecting a string of unrelated words through a made-up story. Peg-word System – This uses number and imaged pegs on which to attach the target items. Verbal Learning Application Peg-word system HAVE A NICE DAY Psyc 337: Psychology of Learning FACTORS AFFECTING VERBAL LEARNING Dr. Ernest Darkwah DEPARTMENT OF PSYCHOLOGY Lecture objectives 1. Discuss some factors that can influence verbal learning FACTORS AFFECTING VERBAL LEARNING Test yourself What is the serial position effect in verbal learning Describe how higher-order conditioning occurs In classical conditioning “spontaneous recovery” refers to… Differentiate between the behavioural and cognitive approaches to learning What is the main goal of the neuropsychological approach to the study of learning Differentiate between classical and operant conditioning theories of learning Test yourself Explain the three major laws of learning formulated by Thorndike. Factors affecting verbal learning Class activity: In 5 Minutes discuss with the person next to you: If you had a list of hundred words to memorize and reproduce later, what could affect your ability to memorize the words Factors affecting So far, researchers have established that verbal learning is one of the most common types of learning in humans Like all other types of learning, there are certain key factors that can affect (enhance/ inhibit) verbal learning ability. Factors affecting verbal learning 1. Inter-trial interval Verbal learning occurs through several study trials and test trials Study trial: here the list of words is presented to the subjects to memorize. It is also referred to as the Presentation Trial Test Trial: Here subjects are asked to recall the list presented in the study trial either serially or freely The time interval allowed between the study and test trials can significantly affect the effectiveness verbal learning Factors affecting verbal learning Too Little time for study trial, for instance, may affect the encoding process and reduce the amount of words subjects may encode. A long interval between the study trial and the test trial may risk decay and also reduce recall ability Decay: Refers to the fading of memory due to the passage of time Factors affecting verbal learning 2. Stimulus Meaningfulness & Familiarity Meaningfulness refers to the extent to which the words on a list make sense to the subjects memorizing them Verbal learning theory holds that words that are meaningful are easier to encode and recall as compared to words that are meaningless Ebbinghaus found that as the meaningfulness of the items in the serial list increases, the list requires fewer trials to learn. Factors affecting verbal learning In free recall experiments, it has been found that meaningfulness is positively related to the amount recalled. Stimulus familiarity refers to the extent to which a subject in a verbal learning experiment has already been exposed to a stimulus (word) appearing on the list. Research shows that, the more familiar a subject is to a stimulus the higher the recall potential for that stimulus Factors affecting verbal learning 3. Massed repetitions versus distributed repetitions Verbal learning research over the years has shown that distributed repetition of stimuli allow for better encoding and recall than massed repetition of stimuli. This is also called the Spacing Effect Massed repetition refers to repeating something or stimuli over and over to the subject without pausing Distributed repetition means periodic breaks are observed between study trails. Factors affecting verbal learning In essence: repeating something after four days will create higher levels of memory retrieval than repeating it after two days Similarly, a repetition interval of one day will produce more remembering than a repetition interval of half a day Factors affecting verbal learning 4. Frequency: Learning and retention is also influenced by the frequency with which particular words are encountered. Verbal learning experiments have shown that subjects recall items which they frequently heard or seen better. Further research has also shown that the frequency with which words have been experienced determines their availability as responses in new memory connections. Factors affecting verbal learning 5. Serial Position (primacy versus recency): This is the view that verbal learning (serial learning) can be affected by the position of each item within the list. It has been found that the first and the last items are learned quicker and with fewer errors, than the middle items. This is known as the primacy & recency effects Factors affecting verbal learning 6. Similarity Researchers have observed that there is a close relationship between similarity and generalization This is the view that when we associate a stimulus to a response and we learn this association, there is a tendency for us to give this response to a stimulus that is similar to the initial stimulus. Factors affecting verbal learning 7. Imagery and concreteness: The role of imagery in learning is an important one. When we learn verbal material, we may do so by forming images of it. The image arousing capacity of the verbal material is important in verbal learning. Concrete words are those which generate images easily. Abstract words, on the other hand do not easily or not at all generate images. Thus, it is easier to learn words which are concrete. Factors affecting verbal learning 8. Motivation Remember the saying “Where there is a will there is a way” ? This saying holds true for verbal learning as well. Motivation “the drive or will” to do something plays a significantly important role in verbal learning. Factors affecting verbal learning Researchers have shown that when subjects have a critical reason to (or a reason that is important to them) to learn and recall verbal material, their learning is more effective. Verbal learning research has also shown that motivational instructions serve as an incentive and subjects are thereby motivated to do better. However, not all studies have born positive results on the role played by motivation in verbal learning. Harley and Weiner found that verbal learning is least influenced by the magnitude of reinforcement. Factors affecting verbal learning 9. Memory Capacity & Savings Score This has to do with the subject’s individual ability to learn and the pace of the subject’s learning ability. The measure of the estimated percentage learning/ retention in verbal learning is called the Savings Score The Savings score was developed by Herman Ebbinghaus to measure the amount of nonsense syllables he was able to learn and recall in an experiment. Factors affecting verbal learning After learning a list, he would wait a period of time (the retention interval) and see if he could recite the list without an error. If he missed anything, he would practice the list until he met the criterion again (relearning). He then compared the number of trials it took him to learn the list with the number of trials it took him to relearn it, using the following formula: Number of Trials to Learn – Number of Trials to Relearn Number of Trials to Learn X 100 NB: Multiplying by 100 makes the score a per cent For example, suppose it took you 12 trials to learn a list. Then after 24 hours of retention interval, it took you 4 trials to relearn it. The savings score would be _____ ? Factors affecting verbal learning 12 – 4 12 X 100 = 67% This means that 67% of the original information was retained during the interval between learning and testing. HAVE A NICE DAY