Table 6. Results from the test-retest study (consistency two way mixed single intraclass correlation coefficient).
| Subtest scores Mean (standard deviation) |
ICC |
||||
|---|---|---|---|---|---|
| Trial 1 | Trial 2 | Trial 3 | 2 trials | 3 trials | |
| Word categories task | 14.81 (5.69) | 15.06 (5.11) | 15.80 (4.96) | 0.797 | 0.836 |
| Opposite task | 30.80 (22.94) | 32.06 (21.87) | 34.18 (20.30)* | 0.754 | 0.814 |
| Visual memory task II | 13.40 (3.01) | 13.27 (2.91) | 14.31 (3.29) | 0.700 | 0.790 |
| Attention task II | 21.97 (8.78) | 23.68 (8.50) | 24.54 (7.40) | 0.406 | 0.547 |
| Sequences | 11.28 (5.61) | 10.96 (5.53) | 11.31 (5.72) | 0.795 | 0.855 |
| Calculus task | 19.64 (9.67) | 20.35 (9.08) | 20.52 (9.54) | 0.847 | 0.880 |
| Puzzles | 4.97 (3.82) | 5.04 (2.23) | 5.02 (2.42) | 0.610 | 0.768 |
| Written comprehension | 14.01 (5.18) | 14.05 (3.78) | 14.92 (3.61)* | 0.660 | 0.811 |
*Statistically significant difference between trials 2 and 3 in Student’s T test for related samples (p < 0.05).