Table 3.
Group differences between ADHD and HC groups for ERP and behavioral measures.
| Measures | ADHD M(SD) N = 35 | HCM(SD) N = 34 | Test statistic | Effect sizea | p-value |
|---|---|---|---|---|---|
| ERP Measures | |||||
| Go N2 Amplitude | −9.18(3.35) | −8.91(3.29) | F(1,67)=0.12 | −0.271 | 0.744 |
| No-Go N2 Amplitude | −8.24(3.36) | −9.21(3.43) | F(1,67)=1.44 | 0.286 | 0.235 |
| N2 Difference Wave | 0.94(2.11) | −0.31(1.83) | F(1,67)=6.82 | 0.634 | 0.011 |
| Go N2 Latency | 231.02(68.74) | 208.75(74.73) | F(1,67)=1.66 | 0.310 | 0.202 |
| No-Go N2 Latency | 205.88(58.03) | 193.07(68.68) | F(1,67)=0.70 | 0.202 | 0.405 |
| Go P3 Amplitude | 6.00(5.01) | 4.11(2.55) | F(1,67)=3.85 | −0.473 | 0.055 |
| No-Go P3 Amplitude | 6.78(5.95) | 6.41(4.57) | F(1,67)=0.08 | −0.070 | 0.773 |
| P3 Difference Wave | 0.78(3.76) | 2.30(3.92) | F(1,67)=2.69 | 0.396 | 0.106 |
| Go P3 Latency | 383.36(115.22) | 355.53(52.38) | F(1,67)=1.65 | 0.309 | 0.203 |
| No-Go P3 Latency | 438.38(129.31) | 392.07(95.75) | F(1,67)=2.85 | 0.406 | 0.096 |
| Behavioral Measures | |||||
| Go Accuracy | 0.90(0.08) | 0.92(0.08) | F(1,67)=0.44 | 0.250 | 0.511 |
| No-Go Accuracy | 0.79(0.11) | 0.76(0.12) | F(1,67)=1.55 | −0.261 | 0.217 |
| Go RT | 512.84(70.06) | 462.16(55.41) | F(1,67)=11.07 | 0.801 | 0.001 |
| Go RT Variability | 133.88(28.58) | 124.56(21.96) | F(1,67)=2.30 | 0.381 | 0.134 |
Abbreviations: M = mean; SD = standard deviation; N = number of participants; ERP = event-related potentials; RT = reaction time
a
Cohen’s d