Table 1.
Sample characteristics and behavioral results in the ADHD and TD groups.
| ADHD (n = 38) | TD (n = 36) | Comparison | ||||
|---|---|---|---|---|---|---|
| M | SD | M | SD | t/χ2 | P values | |
| Number of males | 32 | — | 27 | — | 0.970 | 0.325 |
| Child age (years) | 11.6 | 1.7 | 11.2 | 1.4 | 1.079 | 0.284 |
| Full scale IQ | 108 | 11 | 112 | 15 | −1.574 | 0.120 |
| ADHD-RS | ||||||
| Inattention | 26.9 | 2.7 | 12.5 | 2.5 | 20.104 | <0.001 |
| Hyperactivity/Impulsivity | 19.7 | 4.8 | 11.2 | 3.2 | 8.024 | <0.001 |
| Behavioral Results | ||||||
| RAN times (s) | 22.2 | 6.9 | 16.9 | 3.6 | 4.132 | <0.001 |
| Spatial attention task | ||||||
| Median RTs (ms) | 638.2 | 137.4 | 573.0 | 127.5 | 2.114 | 0.038 |
| Accuracy (%) | 93.4 | 7.3 | 95.1 | 4.6 | −1.252 | 0.215 |
| RTSD (ms) | 206.1 | 76.6 | 149.5 | 55.0 | 3.658 | <0.001 |
ADHD: attention-deficit/hyperactivity disorder; TD: typically developing; ADHD-RS: ADHD-rating scales of behavioral symptoms; RAN: rapid automatized naming; RTs: reaction times; RTSD: variance of reaction times.