Table 1.
Participant Characteristics by Age Group
| Younger | Older | |
|---|---|---|
| Age (years) | 21.67a (2.89) | 69.241b (5.62) |
| Education (years) | 14.95a (1.39) | 16.19a (2.64) |
| Vocabulary | 63.09a (3.69) | 64.38a (3.15) |
| Digit Symbol Acc | 97.48a (2.22) | 95.77a (2.86) |
| Digit Symbol RT (ms) | 1241.33a (243.06) | 1841.38b (275.73) |
| Visual Acuity (log MAR) | −0.11a (0.13) | 0.04 b (0.15) |
Note. n = 21 per age group. Values are means, with standard deviations in parentheses. Vocabulary = raw score (maximum of 70) on the Wechsler Adult Intelligence Scale-Revised (Wechsler, 1981); Digit Symbol Acc and Digit Symbol RT = percentage correct and reaction time (ms), respectively, on a computer test of digit-symbol coding (Salthouse, 1992b). Visual acuity = logarithm of the minimum angle of resolution (MAR), for the Freiburg Visual Acuity Test (FRACT; Bach, 1996). Log MAR of 0 corresponds to Snellen 20/20, with negative values corresponding to better resolution. Means in the same row that do not share subscripts differ by t-test at p < .05.