Table 2.
Principal Components Analysis
| Factor 1 | Factor 2 | Factor 3 | |
|---|---|---|---|
|
|
|||
| Executive Tests |
Clock Drawing/Naming/ Lexical Retrieval Tests |
Memory Tests |
|
| BDT total serial order | .733 | .128 | −.211 |
| Letter fluency | .810 | −.110 | −.046 |
| “Animal” fluency | .586 | –.430 | .366 |
| Boston Naming Test | .051 | –.701 | .043 |
| P(r)VLT Delay Free Recall | .043 | .051 | .868 |
| P(r)VLT Delay Recognition | |||
| Discriminability | −.369 | .156 | .727 |
| Clock total command errors | −.123 | .801 | .082 |
| Clock total copy errors | .102 | .569 | .341 |
| Eigenvalue | 2.20 | 1.46 | 1.31 |
| Percent variance explained | 27.53 | 18.33 | 16.47 |
BDT= Backward Digit Span; P(r)VLT= Philadelphia (repeatable) Verbal Learning Test.