Additional Issues in Classical Conditioning• Discrimination—differential responding between classes of stimuli • Generalization—experience of a less intense CR to classes of stimuli simi
Trang 1Chapter Ten
The Learning Perspective
Trang 2Stage 1 (existing reflex) US UR
Stage 2 (pairing of stimuli) US UR
CS Stage 3 (development of US UR
Trang 3Issues Affecting Classical Conditioning
• Conditioned response (CR) is generally less
intense than the unconditioned response (UR)
• The greater the frequency of CS–US pairings, the more likely conditioning will take place
• If US is very strong, conditioning will take place rapidly
Trang 4Additional Issues in Classical Conditioning
• Discrimination—differential responding between classes of stimuli
• Generalization—experience of a less intense
CR to classes of stimuli similar to CS
• Extinction—gradual weakening of CR in
response to presentation of CS without US
Trang 6Instrumental Conditioning
• Also known as operant conditioning
• Process whereby behavior that is followed by a
“positive state of affairs” is more likely to be done again in a similar situation
– Links an action, an outcome, and the likelihood of
Trang 7Reinforcement and Punishment
• Reinforcer = “positive state of affairs” that increase
(strengthen) the likelihood of a response
– Primary reinforcer—diminishes biological needs
– Secondary reinforcer—associated (through classical
conditioning) with primary reinforcer
– Positive reinforcement—receipt of something positive
– Negative reinforcement—removal of something negative
• Punishment—Negative or aversive outcome that
decreases the tendency of behavior that preceded it
– NOT THE SAME AS NEGATIVE REINFORCEMENT
– Receipt of something negative
– Removal of something positive (time out from positive
reinforcement)
Trang 8Additional Issues in Instrumental Conditioning
• Discriminative stimulus—a stimulus that is present when a behavior is followed by a reinforcer
– Stimulus acts as a switch to turn behavior on and off
(cue function)
– Important in personality because it provides a
mechanism for behavioral complexity
• Generalization—responding in a similar way to
classes of similar discriminative stimuli
– Give continuity to behavior
– Provides a basis for explaining traits
• Extinction—gradual weakening of response from lack of reinforcer
Trang 9Schedules of Reinforcement
• Continuous—behavior always followed by
reinforcement
• Partial—behavior followed by reinforcement less
than every time
• More resistant to extinction—partial reinforcement effect
Trang 10Social Reinforcement
• Less focus on physical needs in the reinforcement
of human behavior, but rather on the effects of
smiles, hugs, praise, approval, love, and interest and attention of others
• People are most affected by social reinforcement
• Social reinforcers don’t require a state of
deprivation
• Invoke principles of self-reinforcement
– Self-reward of desired things
– Reaction to own behavior with self-approval
Trang 11Vicarious Emotional Learning
• Also called empathy
• Experience of emotion from watching another, experience an intense level of the same emotion
• Is not the same as sympathy—concern or
distress at the suffering of another
• Creates opportunities for learning through
vicarious reinforcement
Trang 12Vicarious Reinforcement
• Seeing a person reinforced for a behavior
increases your tendency to do a similar behavior
• Seeing a person punished for a behavior
decreases your tendency to do a similar
Trang 13– Incentive—value of desired outcome (goal)
• Difference from traditional conditioning point of view:
– Traditional perspective doesn’t assume expectancies matter or have causal influence on behavior
Trang 14Efficacy Expectancies
• Albert Bandura
• Perceived ability to carry out a desired action
• Also known as self-efficacy
• Assumption: It’s not enough to know what needs
to be done, one must be confident in ability to do it
Trang 15• Imaginal coding—creating images and mental pictures
• Verbal coding—creating a description
– Production Competency—possession of skills
required to carry out behavior
• Influenced by prior skills and knowledge
Trang 16Acquisition vs Performance
• People don’t always do everything they learn through observation
• Issue: What factors influence performance?
– Observed rewards increase probability of
performance
– Observed punishment decreases probability of performance
Trang 17Modeling Aggression
• Observational learning—may provide examples of innovative aggressive techniques
• Vicarious reinforcement—may suggest that
violence is an appropriate way to deal with conflict
or disagreement
• Desensitization—extinguishing of negative
emotional responses to aggression and violence
Trang 18Assessment (Conditioning-Based
Approach)
• Emphasis on
– Behaviors, rather than cognitions
– Emotional responses being linked to conditioned
stimuli and thus are tied to specific contexts
– Direct observation of behavior
• Physiological assessment — measures physical aspects of emotional responses (used frequently in research settings)
• Behavioral assessment — observations of overt behavior
Trang 19Assessment (Social-Cognitive
Approaches)
• Emphasizes use of self-reports
• Focus on subjective feelings, thoughts and
expectancies, rather than objective aspect of situation
• Particular interest in responses to specific
categories of situations
– Guided by recognition that behavior can vary greatly from situation to situation
Trang 20Problems in Behavior
(Conditioning)
• Phobias—intense irrational fears
• Behavioral tendencies that are instrumentally conditioned, but are not functional or adaptive
Trang 21Behavioral Therapy
• Phobias
– Extinction—avoiding phobic stimulus prevents
extinction
– Systematic desensitization—a form of
counterconditioning involving gradual exposure to
increasingly threatening stimuli paired with relaxation techniques
• Contingency Management
– Alter reinforcement contingencies
Trang 22Problems in Behavior (Social
Cognitive)
• Problems arise from inappropriate emotional or behavioral tendencies from vicarious or direct
learning
• Negative expectancies can have broad influence
on behavior, particularly when generalized
• Skill deficits can reflect incomplete observational learning or inappropriate models
Trang 23Therapy (Socal Cognitive)
• Importance of modeling
– Therapeutic modeling for persons with skills deficits – Treatment of persons with phobias and fears
• Mastery model expresses no fear of feared object
• Coping model expresses initial fear, but over comes it
– Important role of self-efficacy in producing positive treatment outcomes