Date of Award

1968

Document Type

Thesis

Degree Name

Master of Arts

Department

Psychology

Abstract

Clark Hull (1952) proposed that nonreinforccd trials facilitate distinctive after effects and used this "aftereffect" theory to account for the PREE (the greater resistance to extinction of partially rewarded Ss as compared to continuously rewarded Ss). The theory proposed that stimulus traces of a nonrewarded trial (SN) persist and are conditioned to the locomotor response (Ri) on trials which are reinforced and preceded by nonreinforced trials. If t he SN_>Ri association has been established under partial reward conditions, and since SN occurs during extinction, PREE is predicted.

Included in

Psychology Commons

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