Table 1.

Measures of family factors at age 5

	Measure	Informant	Mean (SD) or %	Range	Inter-rater reliability (r)	Reference Citations
Family factors
Maternal warmth	Maternal expressed emotion scale based on the 5 minute speech sample method	2 raters	3.3 (1.00)	0–5	.9	(Caspi, Moffitt & Taylor, 2004)
Child maltreatment	Adapted parenting interview schedule	Mother Clinicians	13.76 (‘probable’ or ‘definite child maltreatment’)	-	.8	(Dodge, Bates, &Pettit, 1990; Jaffee, Caspi, Moffitt, & Taylor, 2004)
Number of siblings	Life History Calendar	Mother	-	0–10	-	(Caspi et al., 1996)
SES	Standardized composite of income, education and social class modeled on the British Social Attitudes survey series	Mother	2 (0.82)	1–3	-	(Jowell et al., 1997)