Instrumental Condtioning & PREE. What is instrumental conditioning?  Modification of behavior by its consequences  Outcome is dependent upon the behavior.

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Presentation transcript:

Instrumental Condtioning & PREE

What is instrumental conditioning?  Modification of behavior by its consequences  Outcome is dependent upon the behavior  e.g. lever-pressing

Reinforcement  Positive Stimulus whose presentation as a result of behavior increases the likelihood of the behavior occurring again in the future e.g. food  Negative Stimulus whose removal as a result of behavior increases the likelihood of the behavior occurring again in the future e.g. removal of uncomfortable conditions

Schedules of Reinforcment  Continuous  Intermittent Variable Fixed Ratio Interval

Partial-Reinforcement Extinction Effect  Animals that are partially reinforced show a greater resistance to extinction than animals that are continuously reinforced i.e. take longer to meet extinction criterion

Partial-Reinforcement Extinction Effect

Theories of PREE  Frustration  Sequential

Sniffy the Rat