Table 2.
Neuropsychological test performance in non-ADHD and in ADHD adolescents before and after 5 weeks of working memory training.
| ADHD Pre-Training | ADHD Post-Training | ADHD Pre- vs Post-Training | |
|---|---|---|---|
| Mean (SD) | Mean (SD) | p | |
| Trained WM Tests | |||
| Cogmed Training Index | 85.5 (10.9) | 115.3 (16.4) | 0.0000001 |
| Non-Trained WM Tests | |||
| WISC-IV Digit Span Forwards Scaled Score | 8.4 (2.8) | 11.1 (3.5) | 0.00001 |
| WISC-IV Digit Span Backwards Scaled Score | 8.7 (2.8) | 12.3 (3.2) | 0.0007 |
| WISC-IV Letter-Number Sequencing Scaled Score | 9.3 (2.3) | 11.1 (2.0) | 0.0005 |
| WISC-IV Spatial Span Forwards Scaled Score | 11.2 (2.5) | 13.4 (2.9) | 0.002 |
| WISC-IV Spatial Span Backwards Scaled Score | 10.3 (1.9) | 13.3 (1.9) | 0.0002 |
| Cognitive “Far Transfer” Tests | |||
| Conner’s CPT-II Omissions T-score | 52.5 (13.0) | 50.0 (12.0) | ns |
| Conner’s CPT-II Commissions T-score | 56.9 (10.7) | 58.1 (7.9) | ns |
| Conner’s CPT-II Hit Rate T-score | 46.4 (12.0) | 43.0 (12.2) | ns |
| ADHD Clinical Severity Indicators | |||
| Hyperactive/Impulsive symptom severity (max 27) | 17.9 (7.3) | 11.4 (6.7) | .002 |
| Inattentive symptom severity (max 27) | 21.7 (5.5) | 15.2 (6.5) | .017 |
| Brown ADD Scales Total T (Child) | 65.5 (12.5) | 57.4 (12.3) | .023 |
| Brown ADD Scales Total T (Parent) | 67.7 (12.4) | 62.2 (11.9) | ns |
| Home Situations Questionnaire problem severity | 5.4 (1.3) | 4.1 (1.6) | .015 |