Table 3.

The Trajectory of School Bonding: Linear and Curved Model Comparison

	Model 1: Linear			Model 2: Quadratic (Curved)
Fixed Effect	Coefficient	SE	t-Ratio	Coefficient	SE	t-Ratio
For Base Rate at Age 18, π0i
Intercept, β00	2.756	0.022	124.700****	2.790	0.024	114.541****
For Rate of Change at Age 18, π1i
Intercept, β10	−0.035	0.006	−5.998****	0.016	0.016	0.989
For Acceleration, π2i
Intercept, β20				0.010	0.003	3.384****
Random Effect	Estimate	χ2	df	Estimate	χ2	df
Var (π0i) = τ00	0.160	1359.659****	620	0.181	1274.885****	604
Var (π1i) = τ11	0.008	1013.495****	620	0.033	778.735****	604
Var (π2i) = τ22				0.001	732.591****	604
Var (eti) = σ2	0.160			0.148
Deviance	4146.434			4125.368
Number of Estimated Parameters	6			10

^*p < 0.1.

^**p < 0.05.

^***p < 0.01.

^****p < 0.001.