Table 1.
Information on the ADHD, HFA and Control children
| Group | ADHD | HFA | Control |
|---|---|---|---|
| Number | 23 | 21 | 18 |
| Age (mean, S.D.) | 10.5 (2.4) | 12.2 (2.4) | 11.1 (1.9) |
| IQ (mean, S.D.) | 98.7 (14.6) | 97.3 (12.3) | 107.7 (11.6) |
| Left-handers | 4 | 2 | 0 |
| Number of Conners’ Parental responses | 23 | 21 | 18 |
| Conners’ ADHD Index (mean, S.D.) | 78.8 (6.2)*^ | 65.5 (11.6)*# | 45.0 (4.8)^# |
| Conners’ Hyperactive Subscale (mean, S.D.) | 84.5 (5.8)*^ | 67.0 (13.6)*# | 47.1 (7.7)^# |
| Conners’ Restless/Impulsive Subscale (mean, S.D.) | 76.9 (8.2)*^ | 64.0 (11.4)*# | 44.6 (4.8)^# |
| Number of ASDI Parental responses | 23 | 21 | 17 |
| ASDI Total score (mean, S.D.) | 0.87 (1.0)*^ | 5.0 (0.9)*# | 0.06 (0.2)^* |
| No. included in Fixed SART FFAUS analysis | 13 | 20 | 18 |
| No. included in Random SART FFAUS analysis | 16 | 19 | 18 |
| No. included in Fixed & Random SART SFAUS analysis | 17 | 20 | 18 |
ADHD: Attention deficit hyperactivity disorder; HFA: high-functioning autism; IQ: intelligence quotient; ASDI: Asperger Syndrome Diagnostic Interview; SART: Sustained Attention to Response Task; FFAUS: fast-frequency area under the spectra; SFAUS: slow-frequency area under the spectra; *significant difference between ADHD and HFA; ∧significant difference between ADHD and controls; #significant difference between HFA and controls; alpha level set at 0.05.