Table 2.
Results of the principal components factor analysis
| Variable | Verbal IQ | Speed/Executive Attention | Memory |
|---|---|---|---|
| % of variance | 25.66 | 22.74 | 12.91 |
| Eigenvalues | 3.08 | 2.73 | 1.55 |
| Tests | |||
| Information | .819 | .146 | .056 |
| Vocabulary | .799 | .173 | .172 |
| BNT | .689 | .223 | .122 |
| Letter Fluency | .610 | .144 | .437 |
| Digit Span | 527 | .267 | −.014 |
| Trails: A (time) | −.043 | −.823 | −.222 |
| Trails: B (time) | −.189 | −.828 | −.212 |
| Trails: B (errors) | −.195 | −.613 | −.021 |
| Digit Symbol | .409 | .611 | .338 |
| Block Design | .400 | .614 | −.059 |
| FCRSRT | −.041 | .159 | .847 |
| Category Fluency | .492 | .137 | .638 |
Note: bold print indicates loading coefficients above.5
Italics indicates significant group differences (fallers vs. non-fallers) on mean factor scores FCSRT-FR=Free Recall from Free and Cued Selective Reminding Test; BNT=Boston Naming Test. Errors on Trails Form A were not included in the PCA due to a ceiling effect.