Table 3.
Factor Analysis of Cognitive and Personality Traits
| Factor 1 | Factor 2 | Factor 3 | |
|---|---|---|---|
| NART IQ | 0.013 | 0.441 | 0.004 |
| CPT-IP | 0.219 | 0.272 | 0.148 |
| RAVLT-IW | 0.110 | 0.854 | 0.211 |
| RAVLT-DW | 0.149 | 0.857 | 0.204 |
| IT block A | 0.144 | 0.206 | 0.581 |
| IT block B | 0.141 | −0.054 | 0.986 |
| SPQ cognitive-perceptual | 0.838 | 0.073 | 0.112 |
| SPQ interpersonal | 0.749 | 0.038 | 0.140 |
| SPQ disorganization | 0.832 | −0.072 | 0.072 |
| TCI cooperativeness | 0.347 | 0.196 | 0.058 |
| SS loadings | 2.197 | 1.881 | 1.460 |
| Proportion Var | 0.200 | 0.171 | 0.133 |
| Cumulative Var | 0.200 | 0.371 | 0.504 |
| Heritability | 0.826 | 0.687 | 0.675 |
Note: TCI, Temperament and Character Inventory; SPQ, Schizotypal Personality Questionnaire; CPT-IP, Continuous Performance Task identical pairs; IT, inspection time; RAVLT-DW, Rey Auditory Verbal Learning Test delayed word recall; RAVLT-IW, Rey Auditory Verbal Learning Test immediate word recall; NART, National Adult Reading Test IQ. Loadings >0.1 are shown in bold. All heritabilities were significant at P < .01. Chi-square test of the hypothesis that 3 factors are sufficient: 49.59 on 25 degrees of freedom, P = .00239.