Table 7.

Regression predicting social understanding composite.

	B	Beta	t	p	ΔR2
Step 1					.183
Age group	− 0.10	− .428	− 4.42	< .001
Step 2					.100
Age group	− 0.13	− .564	− 4.28	< .001
Matrices	0.01	.156	1.73	.172
Processing speed	− 0.04	− .336	− 2.54	.018
Working memory	0.01	.202	2.16	.060

ΔR² represents the additional variance counted for by all the variables in a step. Regression statistics given with relevant variables at a step in the prediction equation. Age group was treated as a dichotomous variable (young vs. older adults) in the regression.