Table 2. Estimated Total Genetic and Shared and Nonshared Environmental Contributions to the Liability Toward DSM-III-R Conduct Disorder Criteria^a.

Conduct Disorder Criteria	Genetic Influences				Shared Environment	Nonshlared Environr mental Influences
	Total a2	Factor 1: Rule Breaking, %	Factor 2: Overt Aggression, %	Specific, %	Total c2 Covert Delinquency, Single-Factor %	Total e2	Factor 1, %	Specific, %
Played hooky	0.53	37	0	63	0.00	0.47	13	87
Run away	0.44	77	1	22	0.01	0.55	29	71
Told lies	0.19	58	9	33	0.13	0.68	13	87
Stole	0.17	32	6	62	0.29	0.54	38	62
Set fires	0.28	0	0	100	0.16	0.56	33	67
Destroyed property	0.08	1	16	83	0.20	0.72	62	38
Hurt animals	0.18	4	16	80	0.10	0.72	33	67
Fight with weapon	0.14	41	59	0	0.04	0.82	86	14
Hurt people	0.35	0	77	23	0.03	0.62	52	48
Fight	0.40	20	80	0	0.01	0.60	16	84

^aIn the columns for Total variance and Factor % under the “Genetic Influences” and “Nonshared Environmental Influences” headings, values +0.30 or more are bolded. No bolding is given for the criterion-specific values. Only a single (Total variance) column is included under “Shared Environment” because the best-fitting structural model contained only a single common factor, with no criterion-specific shared environmental (C) effects.