Table 2.

Correlation Matrix of Behavior Problem Variables with Means, Standard Deviations, Skewness, and Kurtosis

	1.	2.	3.	4.	5.	6.	7.	8.
1. Age	.59
2. Gender (Female = 0)	−.04a	.50
3. W1 Externalizing	.07	.23a	.19
4. W2 Externalizing	.02	.20a	.72	.21
5. W3 Externalizing	.10	.08a	.59	.75	.23
6. W1 Internalizing	.07	.05a	.59	.37	.32	.21
7. W2 Internalizing	−.01	.01a	.43	.59	.51	.59	.23
8. W3 Internalizing	−.01	−.12a	.36	.47	.59	.52	.76	.23
Means	12.09	.45	.24	.25	.27	.27	.24	.23
Skew	−.16	.20	1.52	1.46	1.25	.94	1.71	1.74
Kurtosis	−1.12	−1.97	4.09	4.24	1.95	.49	3.92	4.23

Note. W = Wave; Standard deviations on the diagonal; Bolded coefficients are stability estimates

^apoint-biserial correlations are presented.