Figure 2.

The left side illustrates the finding that females exhibited accurate within-day memory, reaching the memory performance criterion (see Materials and Methods, experiment 1) in significantly fewer days of training than the males. The right side illustrates that males and females were adversely affected equivalently by cat exposure. Both males and females exhibited a significant increase in errors on days they were exposed to the cat compared with the days in which they reached the performance criterion. Shaded bars in both graphs illustrate means (±SEM) for the female group. *P < 0.05 compared with unstressed male and female controls (Holm-Sidak post-hoc comparisons).