Table 1. Latent Factor Scores and Univariate Measures of Tests of Vocabulary, Working Memory, Processing Speed, and Inhibition for the two Groups of Young and Older Adults.

	Young Adults		Older Adults		F (1,195)
	Mean	SD	Mean	SD
Vocabulary	< − 0.01	4.84	9.66	6.99
Years of Education	16.2	0.7	17.1	2.9	1.89
North American Reading Test	31.0	5.3	36.3	7.4	33.29**
Shipley Vocabulary	31.8	3.2	34.9	3.4	46.78**
Working Memory	< − 0.01	4.98	−12.88	4.13
Digits Forward	9.3	2.2	7.7	2.4	4.31*
Digits Backward	7.7	2.4	5.2	0.7	7.68*
Reading Span	3.5	0.8	3.1	0.6	12.43**
Operation Span	4.0	0.9	2.7	1.2	73.45**
Processing Speed	0.0	0.61	−1.99	0.72
Digit Symbol	35.1	4.7	24.4	5.2	229.16**
Stroop Xs	89.1	14.2	69.8	13.9	92.76**
Trail Making A	45.7	10.0	78.4	28.5	108.39**
Inhibition	−0.18	0.13	−0.38	0.21
Stroop words	66.5	12.8	39.3	11.8	43.28**
Stroop Interference %	− 25.5	0.10	−42.1	.15	83.89**
Trail Making B	51.8	12.9	104.3	24.8	18.46**
Trail Making Interference %	−10.4	2.7	−38.2	3.8	23.41**

^*p < .05

^**p < .01