Table 2.
TD | ADHD | ANOVA | ||||||||||||||
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Girls (n = 20) | Boys (n = 39) | All (n = 59) | Girls (n = 29) | Boys (n = 66) | All (n = 95) | Diagnosis | Diagnosis × Sex | |||||||||
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Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | p | d | p | d | |
Real-time DD | 0.59 | 0.14 | 0.56 | 0.14 | 0.57 | 0.14 | 0.48 | 0.13 | 0.56 | 0.16 | 0.54 | 0.16 | .028 | .25 | .035 | .74 |
Classic DD | 0.45 | 0.27 | 0.43 | 0.26 | 0.43 | 0.26 | 0.39 | 0.26 | 0.47 | 0.30 | 0.44 | 0.29 | .883 | .04 | .356 | .33 |
SS backward | 6.65 | 1.69 | 6.79 | 2.36 | 6.75 | 2.15 | 6.00 | 1.56 | 5.70 | 2.22 | 5.79 | 2.04 | .019 | .45 | .550 | .21 |
GNG Com | 0.40 | 0.19 | 0.40 | 0.18 | 0.40 | 0.18 | 0.38 | 0.19 | 0.51 | 0.18 | 0.47 | 0.19 | .160 | .37 | .046 | .68 |
GNG tau | 91.86 | 36.08 | 98.46 | 48.76 | 96.22 | 44.66 | 120.62 | 49.46 | 116.01 | 55.28 | 117.42 | 53.35 | .010 | .41 | .531 | .22 |
SST SSRTa | 231.65 | 95.39 | 214.81 | 110.21 | 220.52 | 104.90 | 317.61 | 129.85 | 321.83 | 122.49 | 320.54 | 124.10 | <.001 | .79 | .614 | .16 |
ADHD = attention-deficit/hyperactivity disorder; Com = commission error rate; DD = delay discounting area under the curve; GNG = Go/No-Go; SS = spatial span; SSRT = stop signal reaction time; SST = Stop Signal task; TD = typically developing controls.
Results for SSD are very similar to SSRT such that there is a significant main effect of Diagnosis (p = .003) and no evidence of a Diagnosis × Sex interaction (p = .928).