Fig. 7

Canonical discriminant function plot for experiment 2 (sex × (+)-naloxone treatment). Experiment 2 discriminant function plot (sex by (+)-naloxone treatment). Correlations between outcome variables and discriminant functions are listed in Table 3. Function 1 separates groups based on sex, largely driven by differences in time spent jumping, jump time, and ambulatory time, whereas function 2 demonstrates an interaction between sex and (+)-naloxone treatment, mostly based on the sexually differential effect of (+)-naloxone on stereotypic counts, ambulatory episodes, and time spent in stereotypic circling. Group centroids indicate the mean discriminant function value of each of the designated groups