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How is behavior “shaped” through operant conditioning?. Operant shaping: demonstration, analysis and terminology Chaining operant behavior (again) The cumulative recorder Asymptotic effects of basic schedules of reinforcement: Fixed-ratio (FR) Fixed-interval (FI)

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how is behavior shaped through operant conditioning
How is behavior “shaped” through operant conditioning?
  • Operant shaping: demonstration, analysis and terminology
  • Chaining operant behavior (again)
  • The cumulative recorder
  • Asymptotic effects of basic schedules of reinforcement:

Fixed-ratio (FR)

Fixed-interval (FI)

Variable-ratio (VR)

Variable-interval (VI)

slide2

R

S

R

S

presses

bar

click of

feeder

food

pellet

approaches

feeder

R

S

R

S

candy

Examples of operant sequences:

Rat in Skinner Box:

Professor Wall on Stage:

?

bell

approaches

Experimenter

slide3

Conditioned

Reinforcer

Unconditioned

Reinforcer

SD: RSRf

candy

“target response”

Professor Wall on Stage:

bell

SD: RSRf

approach

slide4

Operant level

Successive approximations

Differential reinforcement

Reinforcement variables:

Delay of reinforcement

Magnitude of reinforcement

Frequency of reinforcement

Partial Reinforcement Effect (PRE)

slide5

(from last week’s lecture)

order of chained performance

Conditioned

Reinforcer

Unconditioned

Reinforcer

order in which links are learned

etc.

SD: RSRf

?

?

tone

SD: RSRf

bar-press

click

SD: RSRf

food

approach

slide6

Movement of paper

Time

pen

Spool

slide7

No responses

Cumulative

Responses

Low response rate

High response rate

Reading and interpreting a cumulative record:

Time

slide9

Sample AsymptoticCumulative Records:

etc.

reinforcer

etc.

“scallop”

etc.

etc.

FR10

FI 1min.

Cumulative

Responses

VR10

VI 1min

Time