Table II.
Results of the neuropsychological assessment (two sample t test, P < 0.05)
| Test | Healthy controls (n = 12) | ADHD adults (n = 12) | Analysis | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | T value | uncorr. P value | |
| DS‐f | 9.9 | 1.5 | 8.3 | 1.2 | 2.98 | 0.007a |
| DS‐b | 8.1 | 2.0 | 6.3 | 2.0 | 2.12 | 0.045a |
| SS‐f | 7.1 | 1.4 | 8.1 | 1.2 | −1.87 | 0.075 |
| SS‐b | 6.3 | 1.3 | 6.5 | 2.2 | −0.34 | 0.737 |
| WCST‐P | 0.8 | 1.0 | 1.3 | 2.0 | −1.30 | 0.208 |
| WCST‐sc | 2.0 s | 1.3 | 1.4 s | 1.4 | 1.01 | 0.321 |
| Stroop‐RT | 106.9 ms | 61.5 | 105.9 ms | 100.1 | 0.03 | 0.977 |
| Stroop‐err | 0.8 | 1.2 | 1.3 | 2.1 | −0.84 | 0.407 |
DS‐f, digit span, forward condition; DS‐b, digit span, backward condition; SS‐f, spatial span, forward condition; SS‐b, spatial span, backward condition; WCST‐P, number of perseverative errors; WCST‐sc, switch costs; Stroop‐RT, Stroop‐effect, reaction time; Stroop‐Err, Stroop‐effect, number of errors. See also Neuropsychological results and Neuropsychological tests sections for a detailed description of the cognitive tasks, the statistical analysis and significance levels.
a
This difference did not survive the Bonferroni correction for multiple comparisons (P < 0.0064).