Study 2: Pair-wise variance covariance matrix of variables in the final model

	1	2	3	4	5	6	7	8	9
1. Language, 4 years	.93
2. Internalizing behavior problems, 4 years	−.18	.97
3. Externalizing behavior problems, 4 years	−.30	.50	1.00
4. Language, 10 years	.62	−.12	−.18	1.00
5. Internalizing behavior problems, 10 years	−.29	.22	.33	−.19	1.00
6. Externalizing behavior problems, 10 years	−.14	.05	.44	−.19	.51	1.01
7. Language, 14 years	.58	−.10	−.20	.83	−.29	−.27	1.00
8. Internalizing behavior problems, 14 years	−.23	.25	.17	−.11	.40	.19	−.10	.97
9. Externalizing behavior problems, 14 years	−.11	.14	.27	−.21	.34	.63	−.25	.41	1.00

Note. All variables were scaled by constants so that variable variances are all ≈ 1.