Classical Models for Twin Data: The Case of Categorical Data

Figures & data

Table 1. Parameter estimates (0* indicates a fixed value) and standard errors

Parameter	ACE	ADE	ACDE
${\hat{h}}^2$	0.709(0.084)	1.017(0.157)	0.275(0.014)
${\hat{c}}^2$	0.103(0.079)	0*	0.117(0.045)
${\hat{d}}^2$	0*	−0.206(0.159)	0.289(0.047)