Table 8.

Multiple regression analysis predicting chemistry score

Predictor	b	β	p	∆F	Sig ∆F	R 2	R 2∆
Step (1) Age (months)	.045	.122	.103	26.09	<.001	.18	.18
Step (2) British Picture Vocabulary Scale raw score	.129	.517	<.001	60.52	<.001	.45	.28
Step (3) Embedded Figures (I‐S)	.167	.141	.046	6.47	.012	.48	.03
Step (4) Scaling (E‐S)	.229	.147	.049	3.95	.049	.50	.02

Betas refer to values when all predictors are entered into the final model. The Sig ∆F is the p value of the change in F for each step of the regression model.