Multiphasic Retention Deficits at Periodic Intervals after Passive-Avoidance Learning

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Science  13 Apr 1973:
Vol. 180, Issue 4082, pp. 208-210
DOI: 10.1126/science.180.4082.208


Aftetr one-trial passive-avoidance training, indepelenet groups of rats tested promptly after training or at successive 6-hour intervals displayed a repetitive pattern of high then low retention scores. These results suggest that some physiological rhythm may interact with retention performance.