Table 2.
Clustering and recall performance across trials on the CVLT-II, and corresponding Pearson correlation coefficients
| Clustering |
Recall |
Correlation Analyses |
||||
|---|---|---|---|---|---|---|
| M | SD | M | SD | r | p | |
| Controls | ||||||
| Trial 1 | 0.023 | 0.833 | 5.51 | 1.51 | .415* | .002 |
| Trial 5 | 1.717 | 3.050 | 11.94 | 2.76 | .565* | <.001 |
| Short-delay | 2.355 | 2.470 | 9.70 | 3.24 | .718* | <.001 |
| Long-delay | 2.845 | 2.767 | 10.36 | 3.48 | .697* | <.001 |
| naMCI | ||||||
| Trial 1 | –0.087 | 0.751 | 4.93 | 1.72 | .299 | .108 |
| Trial 5 | 0.993 | 2.221 | 11.37 | 2.37 | –.159 | .400 |
| Short-delay | 1.427 | 1.826 | 9.03 | 3.01 | .592* | .001 |
| Long-delay | 2.100 | 2.578 | 9.63 | 2.62 | .569* | .001 |
| aMCI | ||||||
| Trial 1 | –0.049 | 0.626 | 3.99 | 1.69 | .039 | .727 |
| Trial 5 | 0.088 | 1.454 | 7.65 | 2.57 | .363* | .001 |
| Short-delay | 0.213 | 1.156 | 4.65 | 3.54 | .357* | .001 |
| Long-delay | 0.566 | 1.409 | 3.96 | 3.66 | .663* | <.001 |
| AD | ||||||
| Trial 1 | –0.060 | 0.526 | 2.80 | 1.77 | –.125 | .512 |
| Trial 5 | 0.080 | 0.853 | 5.10 | 2.29 | .331 | .074 |
| Short-delay | 0.160 | 0.334 | 1.20 | 1.75 | .002 | .990 |
| Long-delay | 0.160 | 0.225 | 0.53 | 1.01 | –.298 | .110 |
Note. CVLT-II = California Verbal Learning Test-II (raw chance-adjusted semantic clustering scores: –3 to 9, raw recall scores: 0 to 16; Delis et al., 2000)
*
Significant correlation between clustering and recall measures (p ≤ .0125).