Figure 1

Time (s) spent outside the shelter, in contact with the collar, inside the shelter, and number of approaches and number of transitions for LEW and SHR rats of both sexes exposed to a collar with or without cat odor. The bars and vertical lines represent the means and SEM of animals grouped by strain and gender (n = 8). * Indicates overall odor effect (control vs. cat odor; ANOVA, p < 0.05).