Behavioral Learning Theory : Pavlov, Thorndike & Skinner M. Borland E.P. 500 Dr. Mayton Summer 2007 Behavioral Learning Theory Learning is an observable change in behavior due to events in the environment; as conditions change, new behaviors are learned and old ones are eliminated Components of Behavioral Learning Theory • Reinforcers: positive consequences that strengthens or maintains a desired response • Consequences: Conditions that follow behaviors & affect the frequency of future behaviors • Extinction: When reinforcers are withdrawn, a behavior is weakened and eventually disappear Ivan Pavlov 1849-1936 Classical Conditioning Associating a previously neutral stimulus with an unconditioned stimulus in order to create a conditioned response Components of Classical Conditioning Unconditioned Stimulus: naturally creates a particular response Unconditioned Response: Prompted automatically by a stimulus Neutral stimuli: no effect on a response Conditioned Stimulus: previously neutral stimulus creates a particular response when combined with an unconditioned stimulus Pavlov’s Conditioning Conditioned dogs to salivate at the sound of a bell, using meat powder as a stimulus B.F. Skinner 1904-1990 Operant Conditioning Use of pleasant or unpleasant consequences to control behavior Operant Conditioning Reinforcement is key component Schedule of Reinforcement: frequency, predictability and time between reinforcers Consequences happen after subject acts on environment Provides behavioral explanations for broad range of cognitive phenomena The Skinner Box Used for observing operant conditioning in animal behavior Rats and Pigeons were rewarded (at various intervals) after certain behaviors. Edward Thorndike 1874-1949 Law of Effect: Responses which are followed by a reward will be strengthened and habitual; responses that reduce the likelihood of a reward will be weakened Law of Effect Principles •Law of readiness: responses can be chained together to satisfy a goal •Law of Exercise: connections become strengthened with practice and weakened when practice ceases. Thorndike’s Puzzle Box Hungry cats performed small tasks to escape in order to receive food. Learned through trial and error; used previous experiences in future attempts Similarities Role of environment Importance of consequences on behavior Use of animals in experiments Focus on stimulus and response Belief humans are born as blank slates Internal cognitive Function/memory excluded Use of food for reward during trials Apply equally to different Learning can be transferred behaviors and species Comparisons Pavlov Skinner Thorndike Relationship to be Strengthened Association between 2 stimuli No relationship to be strengthened Association between stimulus and response Focus Reflexes Interval of reinforcements Trial and time of learning Responses Elicited, Emitted, Produce a follows stimuli consequence Reinforcment Not focused on rewards Shapes behavior Adaptive to pressure in environment Learning requires Practice and rewards Classroom implications •Reinforcement shapes behavior (praise, grades, attention, punishment) •Cues (antecedent stimuli) inform students which behaviors will be reinforced or punished •Behavior can be shaped with feedback, rewards and extinction •Generalization (transfer of behavior) allows students to learn under one condition and apply knowledge to other contexts. •Fixed schedules of reinforcement can be used to teach a behavior; variable schedule of reinforcement can be used to maintain a behavior. References Slavin, R. ( 2006 ). Educational Psychology: Theory and Practice (8th ed,pp 134-160) Boston: Pearson. http://suestudent.syr.edu/~ebarrett/ide621/behavior.htm http://tip.psychology.org/.html http://tutorials.maconstate.edu/LEARNING/trial_error_3.htm http://webspace.ship.edu/cgboer/skinner.html http://www.macalester.edu/psychology/whathap/diaries/diari esf95/Emilie/Diary6.html http://www.psy.pdx.edu/PsiCafe/KeyTheorists/.htm http://www.scholarpedia.org