Date of Award
Master of Arts
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.
Johnson, Ronald Seymour, "Effect of maze arm alternation on maze traversal latency : analysis of the aftereffects hypothesis" (1968). Master's Theses. 1199.