Table S2.

Exploratory model predicting group performance from group concentrations of testosterone and cortisol

	Model 1					Model 2
Variable	Slope	SE	df	t	P	Slope	SE	df	t	P
Intercept	−0.01	0.17	71	−0.04	0.97	−0.01	0.17	68	−0.04	0.97
High testosterone/low cortisol	0.00	0.05	71	−0.01	0.99	0.00	0.04	68	0.01	0.99
High testosterone/high cortisol	0.01	0.06	71	0.13	0.89	0.00	0.05	68	0.09	0.93
Time of day						0.02	0.05	68	0.34	0.74
No. of females						−0.39	0.25	68	−1.60	0.11
Group size						0.33	0.14	68	2.26	0.03

n = 74 groups.