Table 2.

Multilevel models predicting group performance

	Model 1					Model 2
Variable	Slope	SE	df	t	P	Slope	SE	df	t	P
Intercept	0.18	0.11	70	1.66	0.10	0.18	0.11	67	1.55	0.13
Cortisol, mean	−0.08	0.36	70	−0.23	0.82	0.04	0.34	67	0.13	0.90
Testosterone, mean	1.15	0.92	70	1.25	0.22	0.71	0.84	67	0.85	0.40
Cortisol × testosterone, mean	−3.35	1.42	70	−2.36	0.02	−2.68	1.18	67	−2.27	0.03
Time of day						0.04	0.05	67	0.85	0.40
No. of females						−0.07	0.27	67	−0.26	0.79
Group size						0.13	0.13	67	0.94	0.35

n = 74 groups.