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Learning Adaptation to the Environment  Learning—a process that produces a relatively enduring change in behavior or knowledge due to past experience.

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Presentation on theme: "Learning Adaptation to the Environment  Learning—a process that produces a relatively enduring change in behavior or knowledge due to past experience."— Presentation transcript:

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2 Learning

3 Adaptation to the Environment  Learning—a process that produces a relatively enduring change in behavior or knowledge due to past experience  Conditioning--the process of learning associations between environmental events and behavioral responses

4 Learning Processes  Classical conditioning  Operant conditioning  Observational learning

5 Pavlov’s Dogs  Digestive reflexes and salivation  Psychic secretion

6 Classical Conditioning UNCONDITIONED STIMULUS REFLEX ACTION will elicit a UNCONDITIONED STIMULUS NEUTRAL STIMULUS REFLEX ACTION will elicit a CONDITIONED STIMULUS will elicit a CONDITIONED RESPONSE NEUTRAL STIMULUS will elicit NO REACTION

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8 Classical Conditioning Factors  Stimulus generalization  Stimulus discrimination  Extinction  Spontaneous recovery

9 Behaviorism  The attempt to understand observable activity in terms of observable stimuli and observable responses  John B. Watson (1913)  B. F. Skinner (1938)

10 John B. Watson and Little Albert  Conditioned emotional responses  Generalization  Extinction

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13 Classical Conditioning and Drug Use  Regular use may produce “placebo response” where user associates sight, smell, taste with drug effect  Classically conditioned responses may be one explanation for the characteristics of withdrawal and tolerance

14 Cognitive Aspects of Classical Conditioning  Reliable and unreliable signals  Actively process information

15 Evolutionary Perspective  Conditioned taste aversions  Internal stimuli—associate better with taste  External stimuli—associate better with pain  Biological preparedness

16 Early Operant Conditioning  E. L. Thorndike (1898)  Puzzle boxes and cats Scratch at bars Push at ceiling Dig at floor Situation: stimuli inside of puzzle box Howl Etc. Press lever First Trial in Box Scratch at bars Push at ceiling Dig at floor Situation: stimuli inside of puzzle box Howl Etc. Press lever After Many Trials in Box

17 B. F. Skinner (1904–1990)

18 B. F. Skinner’s Operant Conditioning  Interested in emitted behaviors  Operant—voluntary response that acts on the environment to produce consequences

19 Reinforcement—the occurrence of a stimulus following a response that increases the likelihood of the response being repeated Operant Conditioning

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21 Reinforcers  Primary—a stimulus that is inherently reinforcing for a species (biological necessities)  Conditioned—a stimulus that has acquired reinforcing value by being associated with a primary reinforcer

22 Punishment Presentation of a stimulus following a behavior that acts to decrease the likelihood that the behavior will be repeated

23 Problems with Punishment  Does not teach or promote alternative, acceptable behavior  May produce undesirable results such as hostility, passivity, fear  Likely to be temporary  May model aggression

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25 Operant Conditioning Terms  Shaping  Extinction  Spontaneous Recovery  Discriminative Stimulus  Schedules of Reinforcement

26 Discriminative Stimuli Environmental cues that tell us when a particular response is likely to be reinforced

27 Reinforcement Schedules  Continuous—every correct response is reinforced; good way to get a low frequency behavior to occur  Partial—only some correct responses are reinforced; good way to make a behavior resistant to extinction

28 Partial Schedules—Ratio  Ratio schedules are based on number of responses emitted  Fixed ratio (FR)—a reinforcer is delivered after a certain (fixed) number of correct responses  Variable ratio (VR)—a reinforcer is delivered after an average number of responses, but varies from trial to trial

29 Ratio Responses  FR—highest level of responding  VR—high rate with few breaks

30 Partial Schedules— Interval  Interval schedules are based on time  Fixed interval (FI)—reinforcer is delivered for the first response after a fixed period of time has elapsed  Variable interval (VI)—reinforcer is delivered for the first response after an average time has elapsed, differs between trials

31 Interval Responses  FI—steady schedule with “scalloped” look, responses drop off right after reinforcer  VI—steady, consistent schedule of response

32 Contemporary Views of Operant Conditioning  Cognitive map—term for a mental representation of the layout of a familiar environment  Latent learning—learning that occurs in the absence of reinforcement, but is not demonstrated until a reinforcer is available  Learned helplessness— phenomenon where exposure to inescapable and uncontrollable aversive events produces passive behavior

33 Biological Predispositions  Animal training issues  Instinctive drift—naturally occurring behaviors that interfere with operant responses

34 Classical Conditioning vs. Operant Conditioning

35 Observation Learning  Observation  Modeling  Imitation  Albert Bandura and the BoBo doll study

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