TABLE 4.
Results of principal component analysis on the neurocognitive measures
| Neurocognitive measures | Information Processing and Control | Attention Accuracy | Visuospatial Working Memory | Interference Control | Verbal Working Memory | Attention Efficiency |
|---|---|---|---|---|---|---|
| Information processing | 0.878 | |||||
| Lapses of attention | 0.842 | |||||
| Speed of alerting attention | −0.788 | |||||
| Accuracy of alerting attention | 0.870 | |||||
| Speed of spatial attention | 0.821 | |||||
| Accuracy of spatial attention | −0.849 | |||||
| Speed of interference control | 0.785 | |||||
| Accuracy of interference control | 0.847 | |||||
| Verbal short‐term memory | 0.825 | |||||
| Verbal working memory | 0.804 | |||||
| Visuospatial short‐term memory | 0.860 | |||||
| Visuospatial working memory | 0.787 | |||||
| Motor inhibition | 0.563 | |||||
| Eigenvalue | 1.936 | 1.449 | 1.476 | 1.446 | 1.383 | 1.346 |
| Variance explained by component | 0.149 | 0.115 | 0.114 | 0.111 | 0.106 | 0.104 |
Please refer to Table 2 for a description of the measures; Factor loadings >0.300 are displayed.
Abbreviation: MRT, mean reaction time.