Table 2.
Correlations among cognitive measures (n=641)
| Speed | IQ | Word | Color | Trails A | Stroop CW | Trails B | SSRT | RT variability | WCST | |
|---|---|---|---|---|---|---|---|---|---|---|
| EF composite | 0.30 | 0.31 | 0.26 | 0.29 | 0.18 | 0.52 | 0.54 | 0.58 | 0.46 | 0.46 |
| Speed composite | 1.00 | 0.33 | 0.85 | 0.85 | 0.72 | 0.05 | 0.21 | 0.29 | 0.19 | 0.12 |
| IQ Estimated | 1.00 | 0.26 | 0.29 | 0.34 | 0.20 | 0.31 | 0.17 | 0.32 | 0.17 | |
| Word reading (Word) | 1.00 | 0.68 | 0.38 | 0.00 | 0.25 | 0.25 | 0.16 | 0.09 | ||
| Color naming (Color) | 1.00 | 0.41 | 0.00 | 0.25 | 0.22 | 0.19 | 0.13 | |||
| Trails A | 1.00 | 0.12 | 0.00 | 0.24 | 0.26 | 0.10 | ||||
| Stroop CW residual | 1.00 | 0.12 | 0.09 | 0.09 | 0.11 | |||||
| Trails B residual | 1.00 | 0.08 | 0.10 | 0.19 | ||||||
| Stop signal RT (SSRT) | 1.00 | 0.58 | 0.08 | |||||||
| RT variability | 1.00 | 0.12 | ||||||||
| WCST | 1.00 |
Stroop color-word score is the score for the interference condition, with color and word reading scores regressed out. Trails B is a residual score with Trails A score regressed out. See text for explanation. At this sample size, r <= .11 yields p <. 01.