Means ± SEs of the neuropsychological tests and the t test results of the age group comparisons for each test
| Age group | Age | Years of education | Letter–number sequencing | Stroop interference score | Trails difference score |
|---|---|---|---|---|---|
| Younger adults | 23.1 ± 4.2 | 17.4 ± 2.5 | 13.4 ± 3.0 | 0.64 ± 0.09 | 8.4 ± 6.5 |
| Older adults | 71.1 ± 7.8 | 16.4 ± 2.4 | 10.8 ± 3.2 | 0.45 ± 0.13 | 24.4 ± 25.2 |
| Age difference | NS | p < 0.05 | p < 0.001 | p < 0.01 |
Mean scores are presented with SEs for the number of sequences remembered correctly (maximum of 21) in the Weschler Adult Intelligence Scale letter–number sequencing subtest, the ratio between the seconds per item completed on the congruent and incongruent versions of the color Stroop test, and the difference in time (seconds) to complete versions B and A of the trail-making test.