Table 4.

Model fitting results examining the expanded longitudinal model of years 1, 2, and 3 home literacy environment (HLE) with years 1, 2 and 3 Boston Naming Test (BNT)

Model	−2LL	df	Null χ2change	NullΔdf	Null pchange
Full	5461.32	1999
Drop all HLE factors	5502.15	2005	40.83	6	*
Drop HLE year 2 and HLE year 3	5472.36	2002	11.04	3	*
Drop HLE year 2	5472.36	2001	11.04	2	**
Drop HLE year 3	5461.32	2000	.00	1	NS

Note. The model fit of the full expanded longitudinal model versus a fully saturated model was tested. This resulted in a nonsignificant decrease in model fit (χ²_change = 65.28, Δdf = 60, ns), suggesting that the full expanded longitudinal model fit the data as well as the saturated model. Therefore, the null full expanded longitudinal model was used as the full model.

^**p < .05

^*p < .001.