Table 1.

Group demographics and neuropsychological test performance

Measure	Young	Old
Age	19.4 (1.58)	67.3 (4.04)*
Gender	10/18 female	9/18 female
Education	13.67 (1.45)	16.13 (3.05)*
Shipley vocabulary	34.3 (9.06)	38.2 (9.76)
Digit span forward	7.71 (1.26)	7.22 (1.26)
Digit span backward	5.59 (1.50)	5.61 (1.29)
Digit-symbol substitution	62.4 (11.0)	47.7 (7.62)*
WCST (# of errors)	14.7 (6.68)	26.6 (12.9)*

Note: Standard deviations in parentheses. All neuropsychological test scores are reported as raw scores.

^*= significantly different from Young (p < 0.05).