Table 1. Behavior of rats in the lone and dyad trials.

Mean (± SEM) of parameters that depict the behavior during the 15 min trials.

Parameter	Lone individuals	Individuals in a dyad	w23 / t23/ f23	P (two tailed)
Cumulative distance (m.)	158.133 ± 5.785	190.058 ± 4.462	w = -4.286a	< 0.0001
Total number of trips to grid zone	11.130 ± 0.490	15.630 ± 0.645	w = -3.934a	< 0.0001
Total number of visits to the objects	51.250 ± 2.791	58.208 ± 2.134	w = -2.544a	0.011
Trip duration (min.)	0.585 ± 2.791	0.430 ± 0.020	w = -3.486b	< 0.0001
Mean number of visits per trip	4.656 ± 0.218	3.771 ± 0.099	w = 2.069	< 0.001
Time in the home corner	22.736 ± 2.508	17.403 ± 1.044	t = 2.069	0.040
Visits to the home base	6.750 ± 0.457	11.792 ± 0.811	t = 2.069	< 0.001

Trials were compared by a Wilcoxon Signed Rank test: a—based on negative ranks; b—based on positive ranks. A paired sample t- test was performed on the difference between the average number of visits per trip of the rats when tested with a partner compared with being tested alone. Test parameters are depicted in the table above. The differences are normally distributed (Shapiro—Wilks normality test results: w = 0.975; p value = 0.7976).