(d).
| Variable | N | Mean PR | SD |
|---|---|---|---|
| VLMT sum scores | 115 | 46,87 | 32,64 |
| RWT (formal lexical) | 109 | 31,71 | 27,06 |
| RWT (semantic) | 110 | 28,84 | 26,54 |
| WMS (text reproduction immediate) | 101 | 34,83 | 31,35 |
| WMS (text reproduction delayed) | 99 | 33,30 | 31,37 |
| WMS (digit span forward) | 100 | 45,69 | 29,43 |
| WMS (digit span backward) | 96 | 43,18 | 31,17 |
| TAP (divided attention IPS auditory) | 113 | 22,24 | 22,82 |
| TAP (divided attention IPS visual) | 23 | 35,48 | 25,37 |
| TAP (shifted reaction IPS) | 92 | 23,38 | 23,53 |
| Trails A (time until completion) | 116 | 44,81 | 28,74 |
| Trails B (time until completion) | 113 | 45,94 | 28,32 |
| d2 (summation number) | 101 | 27,64 | 28,53 |
| d2 (error percentage) | 101 | 42,98 | 29,64 |
| WIE (number-symbol test) | 61 | 33,04 | 24,98 |
| TAP (shifted error reaction amount) | 92 | 49,52 | 29,37 |
Note: the expected normal value for control population is a percentile rank (PR) of 50. Values below 50 are considered worse performance than expected for controls, pointing to cognitive impairment.