Table 4. Hierarchical regression analyses for the timing measures for the models with the information processing speed as first predictor.

	DL (0.5/1-s)				DL (4/8-s)				WR
Variables	B	SE B	β	R2	B	SE B	β	R2	B	SE B	β	R2
Model 1
1. Processing Speed	−57.72	7.05	−.52***	.27***	−479.6	52.86	−.56***	.32***	−.08	.01	−.60***	.37***
Model 2
1. Processing Speed	−36.99	8.55	−.34***		−454.1	66.94	−.53***		−.06	.01	−.48***
2. Short-Term Memory	−17.68	10.32	−.16		−42.06	80.84	−.05		−.02	.01	−.13
2. Working Memory	−19.63	9.79	−.18*		−1.44	76.67	−.01*		−.01	.01	−.10
Overall significance				.34***				.32				.39 *
Model 3
1. Processing Speed	−31.81	9.92	−.29**		−514.3	77.41	−.60***		−.06	.01	−.48***
2. Short-Term Memory	−19.83	10.53	−.18		−17.11	82.16	−.02		−.02	.01	−.13
2. Working Memory	−17.46	10.02	−.16		−26.66	78.13	−.03		−.01	.01	−.10
3. Selective Attention	−8.77	8.53	−.08		101.95	66.51	.12		.01	.01	−.01
Overall significance				.34				.33				.39
Model 4
1. Processing Speed	−25.41	19.30	−.23		−439.4	150.45	−.52**		−.05	.02	−.39*
2. Short-Term Memory	−20.24	10.61	−.18		−21.99	82.74	−.03		−.02	.01	−.13
2. Working Memory	−16.54	10.32	−.15		−15.85	80.46	−.02		−.01	.01	−.09
3. Selective Attention	−8.59	8.56	−.08		104.0	66.72	.12		.01	.01	−.01
4. Age	−.07	.19	−.07		−.87	1.50	−.10		.01	.01	−.10
Overall significance				.35				.33				.39

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

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