Table 1.

Sample characteristics

	One T1 version	Three T1 versions	d	p
N	878	685
Age	51.1 (15.1)	52.1 (16.1)	.06	.22
Proportion Female	.67	.67	NA	NA
Self-rated health	2.0 (0.8)	2.3 (0.9)	.36	.00
Years of Education	15.8 (2.6)	15.7 (2.6)	0	.63
T2 MMSE	28.8 (1.5)	28.6 (1.5)	−.13	.11
Scaled Scores
Vocabulary	12.8 (3.0)	12.7 (2.9)	−.03	.48
Digit Symbol	11.5 (2.9)	11.4 (2.7)	−.04	.33
Logical Memory	12.1 (2.8)	11.9 (2.8)	−.07	.15
Word Recall	12.7 (3.1)	12.2 (3.5)	−.15	.00
T11-T21 (years)	2.9 (1.2)	2.5 (0.9)	−.37	.00

Note: Values in parentheses are standard deviations. NA indicates that the value was not applicable. Health was a self-rating on a scale from 1 for “excellent” to 5 for “poor”. MMSE is the Mini Mental State Exam (Folstein, Folstein & McHugh, 1975). Scaled scores are adjusted for age and have means of 10 and standard deviations of 3 in the nationally representative normative samples (Wechsler, 1997a, 1997b). The final column contains Cohen’s d estimates of effect size.