Table 1.

Model outcomes for the frequency with which (a) juveniles received grooming from adults and (b) gave grooming to adults, in each time block. (s.e., standard error; CI, confidence intervals.)

	β	s.e.	Z	p-value	95% CI
(a) grooming received
juvenile age	−0.006	0.044	−0.134	0.893	0.316	0.517
sex (ref: female)	−0.209	0.131	−1.599	0.110	−1.360	−0.573
intercept	−3.253	0.091	−35.717	<0.0001	−3.431	−3.065
full model: log likelihood = −429.21; N = 191. Full versus null model:; p = 0.289
(b) grooming given
juvenile age	0.416	0.051	8.137	<0.0001	0.316	0.517
sex (ref: female)	−0.966	0.201	−4.809	<0.0001	−1.360	−0.572
intercept	−3.329	0.135	−24.723	<0.0001	−3.593	−3.065
full model: log likelihood = −386.64; N = 191. Full versus null model:; p = <0.0001