
Enhancement of long-term place memory (6 h and 24 h) by repetition and spacing of acquisition trials (Experiment 3, n = 16). Memory on T2 after single or three spaced (10 min ITI) encoding trials (1T or 3T-S) at 6 h (A,B) or 24 h (C,D) after encoding. (A,C) Percentage of time in correct zone during probe trials. Stippled horizontal line indicates chance value for percentage swim time in correct zone. (B,D) Latencies (seconds). Black circles represent retention trial latencies. Means ± 1 SEM.










