Glossary P

Purkinje shift refers to the shift from cone spectral sensitivity to rod spectral sensitivity that takes place during dark adaptation.

Purpose may be defined as the ability to imagine and pursue valued goals. According to Erikson, Purpose the the balance between individual initiative and the willingness to cooperate with others

Purposeful distortion is when the subjects "purposely" give false information in a survey which may "distort" the results.

Purposive behavior refers to the behavior that is directed toward some goal and that terminates when the goal is attained.
Purposive behaviorism is a type of Behaviorism Tolman pursued, which emphasizes molar rather than molecular behavior.

Putamen is the structure of the basal ganglia. Also, Putamen refers to a large subcortical structure, one part of the basal

ganglia.

Puzzle box refers to the experimental chamber Thorndike used for systematically studying animal behavior.

Pygmalion effect refers to the idea that if people believe that something is true, they will act in a manner consistent with that belief. Pygmalion effect is also a self -fulfilling pr