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. Author manuscript; available in PMC: 2009 May 11.

Published in final edited form as: Infant Child Dev. 2009 Mar 1;18(2):133–148. doi: 10.1002/ICD.593

Table 3.

Correlations between monozygotic twin (MZ) relative difference scores for across raters

	Mother Ratings
	PFQ-Negativity			PFQ-Positivity
	Time 1	Time 2	Change	Time 1	Time 2	Change
Observer ratings (PARCHISY)
Child negative behaviour	−0.09	−0.07	0.02	0.11	0.00	0.16
Child positive engagement	−0.03^*	−0.09	−0.08	−0.05	−0.13	−0.12
	CBCL-Externalizing			CBCL-Internalizing
	Time 1	Time 2	Change	Time 1	Time 2	Change

Mother negativity	−0.19	0.21^*	0.01	−0.05	−0.02	−0.02
Mother positivity	0.12	0.16	0.04	0.16	0.07	0.05

One-tailed p-values:

^*

p<0.05.