Table 1.
Psychometric Information on the 18 Cognitive Function Tests
| Cognitive Test | Mean | SD | Skew | Hypothesized Domain | Rotated Factor Loading | ||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |||||
| Logical Memory Ia | 8.2 | 4.4 | 0.4 | Episodic memory | 0.72 | 0.50 | −0.04 | 0.06 | 0.07 |
| Logical Memory Iia | 6.6 | 4.4 | 1.0 | Episodic memory | 0.74 | 0.41 | 0.15 | 0.10 | 0.02 |
| Immediate story recall | 8.5 | 2.0 | −0.2 | Episodic memory | 0.82 | −0.08 | −0.00 | 0.07 | 0.06 |
| Delayed story recall | 7.4 | 2.9 | −1.1 | Episodic memory | 0.86 | −0.09 | 0.17 | 0.12 | −0.02 |
| Word List Memory | 13.1 | 4.5 | 0.0 | Episodic memory | 0.55 | 0.14 | 0.27 | 0.21 | 0.46 |
| Word List Recall | 4.0 | 2.4 | −0.2 | Episodic memory | 0.66 | 0.24 | 0.20 | −0.28 | 0.33 |
| Word List Recognition | 8.9 | 2.1 | −2.6 | Episodic memory | 0.19 | 0.02 | 0.66 | 0.18 | −0.21 |
| Boston Naming Test | 12.1 | 2.3 | −0.7 | Semantic memory | 0.16 | 0.64 | 0.48 | −0.01 | 0.18 |
| Category Verbal Fluency |
30.5 | 7.7 | 0.1 | Semantic memory | 0.28 | 0.34 | 0.16 | 0.09 | 0.58 |
| Digit Span Forward | 4.7 | 1.9 | 0.1 | Working memory | −0.14 | 0.12 | −0.12 | 0.74 | 0.28 |
| Digit Span Backward | 3.9 | 1.8 | 0.8 | Working memory | 0.24 | 0.31 | 0.34 | 0.58 | −0.05 |
| Digit Ordering | 4.5 | 2.5 | −0.3 | Working memory | 0.24 | 0.46 | 0.23 | 0.46 | 0.33 |
| Symbol Digit Modalities Test |
23.3 | 14.0 | 0.0 | Perceptual speed | 0.06 | 0.28 | 0.72 | 0.07 | 0.15 |
| Number Comparison | 13.3 | 7.7 | 0.5 | Perceptual speed | 0.03 | 0.18 | 0.80 | −0.00 | 0.24 |
| Stroop Color Naming | 15.0 | 7.3 | −0.3 | Perceptual speed | 0.16 | −0.05 | 0.38 | 0.63 | 0.32 |
| Stroop Word Reading | 40.0 | 14.3 | 0.0 | Perceptual speed | 0.00 | 0.02 | 0.01 | 0.29 | 0.80 |
| Judgment of Line Orientation |
8.3 | 3.7 | −0.5 | Visuospatial ability | −0.01 | 0.78 | 0.20 | 0.17 | 0.10 |
| Standard Progressive Matrices |
8.7 | 2.5 | −0.7 | Visuospatial ability | 0.22 | 0.63 | 0.06 | 0.59 | 0.02 |