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. Author manuscript; available in PMC: 2018 Mar 1.

Published in final edited form as: Dev Sci. 2015 Oct 21;20(2):10.1111/desc.12355. doi: 10.1111/desc.12355

Table 2.

Twin intraclass and cross correlations

	Age 2				Age 3
	Difficult temperament		Negative parenting		Difficult temperament		Negative parenting
	MZ	DZ	MZ	DZ	MZ	DZ	MZ	DZ
Age 2
Difficult temperament	.87	.63	–	–	–	–	–	–
Negative parenting	.37	.25	.87	.70	–	–	–	–
Age 3
Difficult temperament	.60	.50	.33	.26	.78	.58	–	–
Negative parenting	.25	.26	.64	.56	.37	.31	.81	.65

Note: MZ = monozygotic twins, DZ = dizygotic twins. Intraclass correlations are bolded. All correlations are significant at p < .01.