Fig. 7.

The number of marbles buried (a) or digging observations (b) in either the home cage or a cage with new bedding across two tests. Asterisk, single number sign, double number sign, and dollar sign indicate significant differences (p<0.05). The asterisk denotes that overall mice buried more marbles (a) and displayed more digging (b) responses during the second test vs. the first test. The single number sign, double number sign, and dollar sign denote significant interactions: (single number sign) mice buried more marbles (a) and dug more (b) in the new cage compared to the home cage, but only when tested in this condition first; (double number sign) mice dug (b) more in the home cage, but only when tested in this condition second; (dollar sign) mice buried more marbles (a) and dug more (b) in the second test, but only when tested in the home cage. All values represent means ± standard error of the mean