Table 4.
Background neuropsychological assessments
| Task | Max | Control mean (SD) | Normal cut-off | SD mean | SA mean | SA |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N.Y. | S.C. | P.G. | B.B. | M.E. | L.S. | K.A. | ||||||
| Digit span | ||||||||||||
| Forward | – | 6.8 (0.9) | 5 | 5.88 | 4.29 | 3a | 6 | 6 | 5 | 6 | 4a | 0a |
| Backward | – | 4.7 (1.2) | 2 | 4.13 | 1.67 | 2 | 2 | 2 | 0a | 3 | 1a | NT |
| Letter fluency (total FAS) | – | 44.2 (11.2) | – | 13.13 | 7.57 | 5a | 24 | 2a | 0a | 14a | 8a | 0a |
| Raven's coloured progressive matrices (percentile score) | – | – | All cases ≥75 | 5 cases ≥10, 2 cases ≤5 | 50 | 50 | 50 | 50 | <5a | 10 | 5a | |
| WCST (number of categories) | 6 | – | 1b | – | 1.4 | 2 | 6 | 0a | 1 | 0a | 0a | 1 |
| TEA: counting without distraction | 7 | – | 6 | – | 4.5 | 3a | 7 | 3a | 4a | 7 | 3a | NT |
| TEA: counting with distraction | 10 | – | 3 | – | 2.3 | 2a | 1a | 0a | 0a | 9 | 2a | NT |
| VOSP | ||||||||||||
| Dot counting | 10 | 9.9 (0.3) | 8 | 9.88 | 6.29 | 10 | 10 | 5a | 10 | 3a | 6a | 0a |
| Position discrimination | 20 | 19.8 (0.6) | 18 | 19.5 | 17.14 | 20 | 17a | 20 | 18a | 15a | 16a | 14a |
| Cube analysis | 10 | 9.7 (2.5) | 6 | 9.88 | 5.67 | 5 | 9 | 10 | 2a | 4a | 4a | NT |
| Number location | 10 | 8.9 (2.8) | 7 | 9.83 | 7.57 | 10 | 10 | 9 | 8 | 2a | 8 | 6 |
SA patients arranged in order of their word–picture matching task (WPM) scores from the Cambridge 64 set battery.
a Denotes impaired performance (at least 2 standard deviations below the control mean).
b Cut-off for 50- to 74-year olds (regardless of educational level).
NT = not tested.