Table 3.
Post-hoc analyses of symptom ratings before feedback training, after half of the sessions, after feedback training and at 6-months follow-up for each group.
| Time effect | ||||
|---|---|---|---|---|
| Test statistic; effect size | ||||
| pre versus mid | pre versus post | mid versus post | pre versus FU | |
| ADHS-SB Global | t(66) = 8.89; p < .001; dCohen = 1.086 | t(66) = 10.73; p < .001; dCohen = 1.311 | t(66) = 2.82; p = .006; dCohen = 0.345 | t(66) = 8.85; p < .001; dCohen = 1.081 |
| ADHS-SB Inattention | t(66) = 7.07; p < .001; dCohen = 0.864 | t(66) = 9.26; p < .001; dCohen = 1.131 | n.s | t(66) = 8.14; p < .001; dCohen = 0.994 |
| ADHS-SB Hyperactivity | t(66) = 6.12; p < .001; dCohen = 0.611 | Z = -5.83; p < .001; r = 0.712 | n.s | Z = − 5.23; p < .001; r = 0.639 |
| ADHS-SB Impulsivity | Z = − 5.32; p < .001; r = 0.650 | Z = − 5.92; p < .001; r = 0.723 | n.s | Z = − 5.70; p < .001; r = 0.696 |
| WRI Global | – | t(66) = 7.04; p < .001; dCohen = 0.860 | – | t(66) = 6.24; p < .001; dCohen = 0.762 |
| WRI Inattention | – | Z = − 4.54; p < .001; r = 0.556 | – | Z = − 5.18; p < .001; r = 0.632 |
| WRI Hyperactivity | – | Z = − 4.24; p < .001; r = 0.518 | – | Z = − 3.14; p = .002; r = 0.384 |
| WRI Impulsivity | – | Z = − 4.26; p < .001; r = 0.520 | – | Z = − 3.06; p < .001; r = 0.374 |
| BDI | Z = − 5.53; p < .001; r = 0.676 | Z = − 5.08; p < .001; r = 0.621 | n.s | Z = − 4.29; p < .001; r = 0.524 |
Note: Only significant post-hoc results are reported. ADHS-SB = German ADHD self-rating scale for symptoms in adulthood35,36; BDI = Beck-Depression Inventory47; EMG = Electromyography; dCohen = effect size Cohen’s d; FU = Follow-up; n.s. = not significant; SCP = Slow Cortical Potential; SD = Standard Deviation; WRI = Wender-Reimherr-Interview35,36: assessment at pre-, post- and follow-up assessment.