Figure 8.

While juvenile play deprivation has no effect, there are sex differences in social recognition in adulthood. Quantification of the amount of time spent interacting with a stimulus rat on both the Train (first trial in which the stimulus rat is novel) and the Test (second trial following a 30 min inter-trial interval in which the stimulus rat is now familiar) trials (A) and the ratio of interaction time on the Test trial compared to that of the Train trial (B) for the short duration barrier study. The same measures are shown in (C,D) for the long duration barrier study. Bars indicate group means ± SEM, and open circles represent data from individual rats. *p < 0.05, **p < 0.01, ***p < 0.001, n = 9–13 per group.