Table 2.
Performances on the verbal memory measure (CVLT)
| Parkinson’s | Controls | |||||
| CVLT Variables | Mean (SD) | Min, Max | Mean (SD) | Min, Max | F | p |
| Learning | 27.5 (3.5) | 19,35 | 29.4 (3.1) | 23,35 | 7.4 | 0.008 |
| Long Delay Free Recall | 7.0 (1.8) | 3,9 | 7.5 (1.4) | 4,9 | 2.4 | 0.13 |
| Retention | 0.8 (1.4) | –2.0,4.0 | 0.6 (1.2) | –2.0,3.0 | 0.16 | 0.69 |
| Cued Retrievala | 14 (0.8) | –2.2,1.6 | 0.0 (0.6) | –1.3,1.5 | 0.88 | 0.35 |
| Long Delay Cued Recall | 7.4 (1.5) | 3,9 | 7.8 (1.1) | 5,9 | 2.3 | 0.13 |
| Cued Recall Intrusionsb | 0.3 (0.6) | 0,2 | 0.3 (0.7) | 0,3 | 0.95 | |
| Recognition Retrievala | 0.1 (1.1) | –2.9,2.3 | 0.0 (0.9) | –2.2,2.7 | 0.14 | 0.71 |
| Hitsb | 8.6 (0.6) | 7,9 | 8.6 (0.7) | 6,9 | 0.76 | |
| False Positivesb | 1.4 (1.7) | 0,6 | 0.9 (1.1) | 0,5 | 0.15 | |
Note: Memory measures are from the California Verbal Learning Test – Short form (CVLT). aCVLT scores are raw scores, except for cued retrieval and recognition retrieval, which are z-scores, since they involved subtraction of measures using different metrics. bGroup comparisons used the Mann-Whitney U test due to the skewed distributions of these variables.