Table 6. Hierarchical regression analyses for the information processing speed scores.

Variables	B	SE B	β	R2
Model 1
1. WR	−4.75	.47	−.60***	.37***
Model 2
1. WR	−3.14	.49	−.40***
2. Short-Term Memory	.31	.08	.31***
2. Working Memory	.13	.07	.13
Overall significance				.49***
Model 3
1. WR	−2.45	.44	−.31**
2. Short-Term Memory	.33	.07	.33***
2. Working Memory	.01	.07	.01
3. Selective Attention	.37	.05	.37***
Overall significance				.60***

Abbreviations: WR, Weber Ratio; B, Unstandardized beta coefficient; SE B, Standard error on beta; β, Standardized beta coefficient.

^* p<.05; ** p<.001; *** p<.001.