Figure 4.

Mean behavioral performance [±standard error of the mean (SEM)] in the active-training task over days of training in the 3 groups in Experiment 2. Mice trained with a single active-training session plus non-task-related exposure to the same odorants (squares) attained significantly better performance than mice trained with a single active-training session and exposed to mismatching odorants (diamonds) or to no non-task-related odorants at all (triangles). #s signify single plus mismatching odorants different from both other groups; asterisks signify single plus matching non-task-related odorants different from both other groups; ^ signifies single plus matching non-task-related odorants different from single plus mismatch only (post hoc Fisher’s tests, P < 0.05). Error bars are ± SEM. This figure is reproduced in color in the online version of the issue.