Table 1.
Promax rotated factor loadings and thresholds (T) of the best-fitting factor model for the four subscales of the CTRS-R:S
| Items | Loadings factor 1 | Loadings factor 2 | Loadings as reported by Conners (2001) (N = 1,897) | T1 | T2 | T3 | |
|---|---|---|---|---|---|---|---|
| Oppositional | 2. Defiant | 0.91 | — | 0.48 | 0.71 | 1.65 | 2.45 |
| 6. Defies | 0.88 | — | 0.50 | 1.02 | 2.00 | 2.74 | |
| 10. Spiteful | 0.69 | — | 0.30 | 1.49 | 2.32 | 3.13 | |
| 15. Argues | 0.84 | — | 0.51 | 0.82 | 1.80 | 2.52 | |
| 20. Explosive | 0.78 | — | 0.41 | 1.20 | 1.92 | 3.12 | |
| Cognitive problems-Inattention | 4. Forgets things | 0.93 | — | 0.55 | 0.34 | 1.29 | 1.82 |
| 8. Poor spelling | 0.81 | — | 0.50 | 0.27 | 0.95 | 1.44 | |
| 13. Poor reading | 0.71 | — | 0.45 | 0.39 | 0.87 | 1.21 | |
| 18. Lacks interest | 0.70 | — | 0.47 | 1.01 | 1.65 | 2.27 | |
| 22. Poor arithmetic | 0.82 | — | 0.49 | 0.55 | 1.22 | 1.68 | |
| Hyperactivity | 3. Restless | 0.73 | — | 0.62 | 0.10 | 0.94 | 1.51 |
| 7. Always on the go | 0.79 | — | 0.57 | 0.66 | 1.31 | 1.87 | |
| 11. Leaves seat | 0.82 | — | 0.58 | 0.62 | 1.37 | 1.83 | |
| 17. Difficulty waiting | 0.83 | — | 0.65 | 0.12 | 0.91 | 1.58 | |
| 21. Runs about | 0.79 | — | 0.44 | 1.21 | 1.89 | 2.51 | |
| 24. Difficulty playing | 0.87 | — | 0.52 | 0.34 | 1.17 | 2.03 | |
| 27. Excitable | 0.86 | — | 0.66 | 0.40 | 1.12 | 1.84 | |
| ADHD index | |||||||
| AP | 1. Inattentive | 0.99 | −0.09 | — | −0.36 | 0.76 | 1.47 |
| 14. Attention span | 0.95 | −0.03 | — | 0.03 | 0.87 | 1.55 | |
| 16. Only pays attention | 0.45 | 0.23 | — | 0.36 | 1.20 | 1.88 | |
| 19. Distractibility | 0.94 | −0.01 | — | 0.59 | 1.54 | 2.25 | |
| 25. Fails to finish | 0.72 | 0.09 | — | 0.24 | 1.27 | 1.99 | |
| 26. Not follow instructions | 0.68 | 0.09 | — | 0.38 | 1.30 | 1.86 | |
| HI | 5. Disturbs | 0.05 | 0.80 | — | 0.20 | 1.03 | 1.52 |
| 9. Remain still | 0.05 | 0.88 | — | 0.92 | 1.68 | 2.24 | |
| 12. Fidgets | 0.16 | 0.67 | — | 0.12 | 0.94 | 1.53 | |
| 23. Interrupts | −0.05 | 0.85 | — | 0.54 | 1.37 | 2.07 | |
| 27. Excitable | −0.09 | 0.91 | — | 0.46 | 1.15 | 1.83 | |
| 28. Restless | −0.06 | 0.97 | — | 0.50 | 1.19 | 1.81 | |
AP attention problems; HI hyperactivity
The thresholds are constrained to be equal in boys and girls. The means and variances of the latent factors in boys are constrained at 0 and 1, respectively. The means and variances of the latent factors are freely estimated in girls. The variances in girls were not significantly different from 1. The means of the latent factors are estimated at −0.60 (oppositional), −0.86 (hyperactivity), −0.42 (ADHD-I AP), and −0.52 (ADHD-I-HI). The mean of the cognitive problems-inattention factor is not significantly different between boys and girls