Table 3.

Cortisol heritability analyses using Mx (ACE models)

	Model fitting results (parameter estimates and confidence intervals)
	Additive genetic effect (a2)	Shared environment effect (c2)	Non-shared environment effect (e2)
Pretask baseline	0.58 (0.13; 0.70)	0.00 (0.00; 0.37)	0.42 (0.30; 0.58)
Post-task 1	0.60 (0.43; 0.72)	0.00 (0.00; 0.24)	0.40 (0.28; 0.59)
Post-task 2	0.56 (0.38; 0.69)	0.00 (0.00; 0.33)	0.44 (0.31; 0.64)
Reactivity	0.44 (0.12; 0.62)	0.00 (0.00; 0.20)	0.56 (0.38; 0.79)

Variance with 95% confidence intervals.