. Author manuscript; available in PMC: 2015 Sep 1.

Published in final edited form as: Psychol Bull. 2014 Jun 23;140(5):1303–1331. doi: 10.1037/a0037091

Table 6.

Age trends in the genetic and environmental contribution to phenotypic stability

Regression Model	b₀	b_0–3	b_3–15	b_15–30	b_30–60	b_60–90	b_{time lag}	τ	LL	AIC	BIC
Genetic Contribution to Stability
Mean Effect Size (BIC Preferred Model)	.358 (.017) ^***	-	-	-	-	-	-	.053 (.016) ^**	−282.281	568.561	575.604
Full Model	.139 (.086)	.090 (.029) ^**	−.008 (.002) ^***	.008 (.002) ^***	−.002 (.001)	−.001 (.001)	−.001 (.005)	.050 (.016) ^**	−275.728	567.456	595.627
Preferred Model (AIC)	.139 (.086)	.090 (.029) ^**	−.008 (.002) ^***	.007 (.002) ^**	−.002 (.001) ^*	←	−.001 (.005)	.050 (.016) ^**	−275.778	565.556	590.206
Environmental Contribution to Stability
Mean Effect Size	.175 (.024) ^***	-	-	-	-	-	-	.062 (.011) ^***	−330.870	665.740	672.783
Full Model	−.082 (.064)	.053 (.022) ^*	.006 (.002) ^**	.008 (.002) ^**	.002 (.001) ^**	−.003 (.001) ^*	−.008 (.003) ^*	.019 (.007) ^*	−275.956	567.911	596.083
Preferred Model (AIC)	−.079 (.065)	.051 (.023) ^*	.007 (.001) ^***	←	.003 (.001) ^**	−.003 (.001) ^***	−.008 (.004) ^*	.019 (.007) ^*	−276.004	566.008	590.659
Preferred Model (BIC)	.034 (.020)	→	→	.008 (.001) ^***	.001 (.001)	←	−.006 (.003)	.024 (.007) ^**	−279.846	569.692	587.299

Note. b₀ represents the intercept; b_0–3 represents the coefficient for the first linear segment, b_3–15 represents the following segment and so on until b_60–90. For simplified models, arrows are used to indicate the parameter estimate that applies during the given developmental period. τ represents the random-effect standard deviation in the between study effect size.

indicates p < .05;

^**

indicates p < .01;

^***

indicates p < .001.