Table S5.

Fixed effects: Reaction times predicted by the picture category preceding the probe

Source	F	df1		df2		P value
Picture category (distress, groom, sex, yawn, play, food, pant hoot, neutral)	2.249	7		581		0.029
Random effects	Estimate	SE	Z	P value	95% confidence interval
Variance	0.053	0.003	16.919	0.000	0.047	0.059
Intercept (ID)	0.063	0.053	1.184	0.237	0.012	0.329
Intercept (ID × Session)	0.002	0.003	0.777	0.437	0.000	0.029

Reaction times (dependent variable) were analyzed in a generalized mixed multilevel model with trials (25 trials) nested in sessions (13 sessions), nested in individuals (4 individuals). Probability distribution = gamma; link function = log; covariance structure of the random effects = variance components. Emotional Intensity scores were provided for each picture by four raters and ranged from 1 (not intense) to 7 (very intense).