Frustration Effect as a Function of Drive

Abstract
27 female rats received 96 acquisition and 16 post-shift trials in an L-shaped double runway. In acquisition food was present both in the first (G1) and the second (G2) goal boxes, but was omitted from G1 on half the post-shift trials. The usual frustration effect (FE), in which response speeds in the second alley are faster following absence as compared with presence of reward in G1, appeared in each of 2 drive (D) groups. However, the magnitude of the FE was greater in the high D group (weights maintained at 80% of initial ad lib. level) than in the low D group (weights at 90%).