Table 1.

Comparisons of the non-preferred (n = 27) and preferred (n = 31) partners (dependent variable) with a binary generalized linear mixed model are presented below to compare various measures of the rats play behavior (predictor variables)

Fixed effect	Not Preferred	Preferred	Estimate	SE	z	p	OR	CI Lower	CI Upper
Intercept			−2.533	1.630	−1.555	0.120	0.079	−5.728	0.660
Partner play frequency	5.11 ± 0.63	7.84 ± 1.05	−0.252	0.145	−1.732	0.083	0.777	−0.537	0.033
% no response	14.81 ±6.97	29.58 ±3.59	0.042	0.019	2.269	0.023	1.043	0.006	0.078
% evasion	29.63 ± 8.96	31.61 ± 2.44	0.022	0.019	1.160	0.246	1.022	−0.015	0.058
% pin	11.11 ± 6.16	30.53 ± 3.72	0.030	0.020	1.557	0.119	1.031	−0.008	0.067
% role reversal	2.38 ±1.43	47.28 ±7.15	0.136	0.052	2.598	0.009	1.146	0.033	0.239

SE, standard error; OR, odds ratio; CI, confidence interval.

The frequency of play initiated by the partner and directed toward the focal rat, as well as the percentage (± standard error of the mean) of the various measures are presented along with the results of the model.