(b).
| Variable | Component loadings | |||
|---|---|---|---|---|
| CVT | IPS | EF | ATT | |
| RWT (formal lexical) | .751 | −.023 | −.095 | −.011 |
| RWT (semantic) | .562 | −.166 | −.172 | −.253 |
| WMS (text reproduction immediate) | .922 | .048 | .158 | −.037 |
| WMS (text reproduction delayed) | .904 | −.015 | .155 | −.015 |
| WMS (digit span forward) | .406 | .020 | −.531 | .176 |
| WMS (digit span backward) | .450 | −.200 | −.328 | .269 |
| TAP (divided attention IPS auditory) | .177 | .867 | −.320 | .022 |
| TAP (divided attention IPS visual) | −.163 | .699 | −.078 | −.114 |
| TAP (shifted reaction IPS) | −.109 | .676 | .106 | .189 |
| Trails A (time until completion) | −.232 | .465 | .313 | −.040 |
| Trails B (time until completion) | −.347 | .362 | .400 | −.202 |
| d2 (summation number) | .216 | −.585 | .034 | .109 |
| d2 (error percentage) | −.155 | .027 | .044 | .911 |
| WIE (number-symbol test) | −.167 | −.660 | −.480 | −.067 |
| TAP (shifted error reaction amount) | .138 | −.148 | .890 | .100 |
Note: higher IPS and EF factor scores indicate lower performance because error amount and time parameters served as variables in the PCA (which becomes clear by examining the loading pattern of these components).