Table 6. Summary of Multilevel Model Predicting Externalizing and Internalizing Behaviors Simultaneously (Sleep Duration).

	Externalizing Behaviors a		Internalizing Behaviors a
Variable	B (S.E.)	β	B (S.E.)	β
Fixed Effects
Constant	9.14 (0.60)***	-	6.47 (0.44)***	-
Temperamental Negative Affect a	3.03 (0.61)***	0.54	3.00 (0.44)***	0.90
Sleep Duration (minutes) b	-0.02 (0.01)	-0.15	-0.01 (0.01)	-0.13
Temperamental Negative Affect * Sleep Duration	-0.02 (0.02)	-0.14	-0.003 (0.01)	-0.03
Variance Components
Externalizing Residual Variance	31.02
Internalizing Residual Variance	11.20
Within Person Residual Variance	11.39
Model Fit	1420.32
Estimate Parameters	12

Note: B = Unstandardized Regression Coefficient; S.E. = Standard Error; β = Standardized Regression Coefficient.

^aCaregiver Reported Questionnaire Data;

^bActigraphy Data

^***p < 0.001