Effects of hippocampal ablation and intertrial interval on runway acquisition and extinction.

Authors:
  • RIRobert L. Isaacson
    Robert L. Isaacson
  • WWWarren O. Wickelgren
    Warren O. Wickelgren
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Abstract
36 rats (12 hippocampal operatees, 12 cortical controls, and 12 unoperated controls) were trained on a linear runway. 1/2 of the Ss received acquisition trials with a 10-sec. intertrial interval while the other 1/2 had 10-min. intertrial intervals. Intertrial intervals during extinction were the same as those used in acquisition. Extinction was slower in hippocampally ablated Ss and an increase in intertrial interval resulted in greater resistance to extinction for these Ss but not for the control Ss.