Reports

Extinction Following Intracranial Reward: The Effect of Delay between Acquisition and Extinction

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Science  15 Mar 1968:
Vol. 159, Issue 3820, pp. 1259-1260
DOI: 10.1126/science.159.3820.1259

Abstract

Rats trained to press a bar for intracranial reinforcement gave as many responses during extinction as did water-reinforced controls, when extinction came immediately after an acquisition session. However, the experimental animals gave fewer responses in extinction than water-reinforced animals when extinction was delayed for 1 hour after acquisition. The activity level of the experimental animals was high immediately after acquisition but declined markedly over the delay period, which suggests that resistance to extinction after intracranial reinforcement is primarily a function of activity level.