TABLE 1.
Means and standard deviations for scores on the Wechsler scales and SNAP-IV for ADHD and Control participants
| Groups | ||||
|---|---|---|---|---|
| ADHD | Controls | |||
| Baseline measures | n | Mean (SD) | n | Mean (SD) |
| WISC-IV/WAIS-IV | 120/5 | 59/0 | ||
| FSIQ | 125 | 88.90 (12.67) | 59 | 96.51 (9.71) |
| Verbal comprehension | 125 | 93.43 (13.36) | 59 | 95.12 (12.97) |
| Perceptual reasoning | 125 | 97.06 (14.04) | 59 | 101.41 (12.00) |
| Working memory | 125 | 82.03 (12.95) | 59 | 93.02 (10.45) |
| Processing speed | 124 | 88.69 (13.59) | 59 | 98.42 (11.06) |
| SNAP–IV | 116 | 30.69 (10.58) | 59 | 5.98 (6.81) |
Notes. ADHD = attention deficit hyperactivity disorder; FSIQ = full-scale intelligence quotient; SD = standard deviation; SNAP-IV = The Swanson-Nolan-Pelham scale, version IV (ADHD-combined score). The SNAP-IV is measured in summary scores (0-54); the WISC-IV/WAIS-IV composite scores are measured in standardized composite scores, mean = 100, SD = 15