Figure 5.

Juvenile play deprivation induces deficits in adult male copulatory behavior. Quantification of the average number of mounts (A), intromissions (B), and the mount rate (C), (the total number of all mounts, intromissions, and ejaculations divided by the active time, multiplied by 60 to indicate the number of mounts per minute) across two 10-min tests with a hormonally primed adult female stimulus rat on P63 and P70 in the short duration barrier experiment. The same measures are shown in (E–G) for the long duration barrier experiment. Panels (D,H) indicate the proportion of animals in each group which ejaculated on one or both tests. Bars indicate group means ± SEM, and open circles represent data from individual rats. *p < 0.05, **p < 0.01, n = 8–14 per group. In (H), ** and ***indicate that the proportion of animals which ejaculated is significantly different (**p < 0.01, ***p < 0.001) from 90%, the amount expected for control animals based on historical data.