Table 3. Two-Phase Growth Curve Models for Academic and Social Self-Concept Representing Development from 3^rd through 7^th Grade and across the Middle School Transition.

	Academic Self-Concept		Social Self-Concept
	Estimate	SE	Estimate	SE
Fixed effects estimates
Intercept, γ00	3.13*	.04	3.22*	.04
Grade in School, γ10	.03	.02	.06*	.02
Middle School, γ20	.01	.03	<.01	.03
(Grade in School)(Middle School), γ30	-.10*	.03	-.01	.03
Random effects estimates
Variance intercept, σ2u0	.41*	.03	.41*	.03
Variance grade in school, σ2u1	.05*	.01	.05*	<.01
Variance (grade)(middle school), σ2u3	.12*	.03	.12*	<.01
Covariance intercept, grade in school, σu0u1	.08*	.01	.06*	.01
Covariance intercept, (grade)(middle school), σu0u3	-.13*	.03	-.12*	.03
Covariance grade, (grade)(middle school), σu1u3	-.06*	.01	-.05*	.02
Residual variance, σ2e	.22*	.01	.21*	.01
-2 Log Likelihood (-2LL)	5700.2		5653.8

Note⁶: SE = standard error;

^*= p< .05