Reflexive Behavior and Respondent Conditioning Behavioral Objectives 1. Distinguish between Fixed Action Patterns (FAP) and Modal Action Patterns (MAP) 2. Learn and write about the primary laws of the reflex and the process of habituation. 3. Review and study Pavlov’s experiments and related phenomena. Elicited Behavior Elicited behavior: behavior that happens in response of an environmental event (can’t be avoided) Reflex: most basic form – Reflex arc: neural structure that underlies many reflexes Phylogenetic Behavior Behavior that are based on the genetic endowment of the organism, and are present on the basis of species history Species specific history provides the organism with a basic repertory of responses that are elicited by environmental conditions (i.e., Natural Selection) 1. Behavior relations based on the genetic endowment of the organism are described as: (a) operants (b) reflexes (c) ontogenetic (d) phylogenetic. Complex Behavior: Fixed Action Patterns (FAP) Greylag goose Part of the repertoire of all members of a species The behavior Pattern is not learned Once a FAP starts, it will continue to completion FAP triggered by sign stimulus FAPs are sequences of behavior (a series of connected movements) that are phylogenetic in origin – FAPs. Fixed sequence of responses elicited by a specific stimulus (sign stimulus or releaser) Species specific, adaptive responses The behavior science model prefers to consider all behaviors as flexible and adaptable Barlow (1968) refers to this behavior as modal action pattern (MAP), implying flexibility rather than rigid genetic control Reaction chains are similar to FAPs, the major difference is that each set of responses in reaction chain requires an appropriate stimulus to set it off Reaction Chain http://www.youtube.com/watch?v=0jZe_VGLRYI 2. Complex sequences of released behaviors are called: (a) traits (b) reaction chains (c) fixed action patterns. (d) second-order conditioned reflexes Reflexive Behavior When an unconditioned stimulus elicits an unconditioned response (US UR), the relation is call a reflex: Laws of the reflex 1. The law of the threshold, there is a point below which no response is elicited and above which a response always occurs 2. The law of intensity-magnitude, as the intensity of the stimulus increases, so does the magnitude of the elicited UR 3. The law of latency, as the intensity of the stimulus increases, the latency to the appearance of the elicited UR decreases 3. Reflexive behavior is said to be_______ and ______. (a) built in; flexible (b) involuntary; elicited. (c) respondent; emitted (d) voluntary; inflexible Habituation Habituation is a decrease in the strength of a response after repeated stimulus presentations Examples of habituation—Orienting responses Function of habituation—Allow the individual to ignore insignificant stimuli that are repeatedly encounter Simple Mechanisms of Learning Habituation: decrease in the strength of an elicited behavior following repeated presentations of the eliciting stimulus – Long and short-term – Stimulus specific – Dishabituation Sensitization: increase in the strength of an elicited behavior following repeated presentations of the eliciting stimulus – Generalization 4. A diminution in the UR due to repeated presentation of the US is called: (a) habituation (b) extinction (c) forgetting (d) sensitization Ontogenetic Behavior The ontogenetic history or lifetime of conditioning, it is a unique characteristic of the organism Learning builds on species or phylogenetic history to determine when, where, and what kind of behavior will be occur at a given moment According to Darwinian evolution and selection, organisms with a capacity for respondent learning were more likely to survive and reproduce 5. Primary laws of the reflex do not include: (a) the law of latency (b) the law of threshold (c) the law of habituation. (d) the law of magnitude Respondent Conditioning: Ivan P. Pavlov Initial research interest –physiology of digestion Developed experimental procedure using dogs Unexpected finding of conditioned reflexes http://www.hermes-press.com/Pavlov3.gif Classical Conditioning Paradigm Select a stimulus (unconditioned stimulus) that reliably elicits an unconditional response (UR) Repeated pairings of the US with a conditioned stimulus (CS) that does not initially elicit the UR The CS will elicit the response of interest. This response to the CS is called the conditioned response (CR) Note---the term “unconditioned” indicates that the stimulus and response connection is unlearned The Variety of Conditioned Responses Eyeblink Conditioning: The US is puff of air directed at the eye; UR is the eyeblink; CS may be tone, light, or tactile stimulus Mazur, Copyright 2006, Prentice Hall Conditioned Responses cont. Conditioned Suppression: US is an aversive event; UR may be to flinch or jump in animals; Learning is measured via the suppression of ongoing behavior when CS is present. Skin Conductance Response: The conductivity of the skin is altered by emotions; Increases in conductivity can be conditioned to any CS paired with a shock. Mazur, Copyright 2006, Prentice Hall Relative Nature of Stimuli Conditioned Taste Aversion (CTA) Taste–aversion often develops after 1 conditioning trial The CS is something an individual eats or drinks; The US is something which makes an individual ill (e.g., poison). Association leads to avoidance of food which makes one ill 6. Respondent conditioning might also be called: (a) S-R conditioning (b) S-S pairing. (c) CS-CR association (d) R-S learning Conditioned Taste Aversions (CTA) If learning occurs reliably after just one trial, it is hard to know if the learning was a result of classical conditioning or operant conditioning – One kind of learning that occurs after a single trial is an association between eating something and getting sick. – This is referred to as a conditioned taste aversion. Contiguity of Stimuli A Primary law of Association (Aristotle, 350 BC) Note of caution. The importance of contiguity or pairing stimuli in time cannot be overestimated 7. To do away with an unwanted CR, one should: (a) present the CS without the CR (b) present the CR without the US (c) present the US without the CS (d) present the CS without the US.