Table 2.

Descriptive statistics and group comparison on cognitive-performance and EEG measures.

		ADHD	Control
		Mean ± SD	Mean ± SD	d	p
OE		7.06 ± 10.11	2.79 ± 4.64	0.54	0.033*
CE		9.76 ± 4.06	7.20 ± 4.20	0.62	0.007*
MRT (ms)		328.96±55.88	308.99±43.76	0.39	0.093
RTV (ms)		121.62±59.61	83.37± 26.99	0.83	<0.001**
P3	Go	0.90 ± 0.65	1.33 ± 0.68	0.65	<0.001**
	No-Go	2.55 ± 1.29	3.83 ± 1.58	0.89	<0.001**
Alpha ERSP	Go (200−600 ms)	−1.94 ± 1.44	−2.49 ± 1.52	0.37	0.06
	No-Go (200−600 ms)	−2.95 ± 2.27	−3.93 ± 2.28	0.43	0.10
	Go (600−1000 ms)	0.00 ± 0.41	−0.14 ± 0.56	0.27	0.19
	No-Go (600−1000 ms)	−1.84 ± 1.43	−3.21 ± 1.93	0.77	<0.0001**
Beta ERSP (Central)	Go (200−600ms)	−1.47 ± 0.72	−1.56 ± 0.72	0.13	0.61
	No-Go (200−600 ms)	−1.86 ± 1.13	−1.94 ± 1.08	0.07	0.75
	Go (600−1000 ms)	0.14 ± 0.220	.16 ± 0.20	0.10	0.68
	No-Go (600−1000 ms)	−0.79 ± 0.85	−1.06 ± 0.75	0.35	0.15
Beta ERSP (Parietal)	Go (200−600 ms)	−1.43 ± 0.77	−1.56 ± 0.70	0.18	0.43
	No-Go (200−600 ms)	−1.95 ± 1.11	−2.38 ± 1.0	0.39	0.04
	Go (600−1000 ms)	0.18 ± 0.220	.16 ± 0.28	0.08	0.81
	No-Go (600−1000 ms)	−0.57 ± 0.68	−0.94 ± 0.80	0.48	0.02*
Theta ERSP	Go (0−500 ms)	1.51 ± 0.84	1.89 ± 0.87	0.44	0.04
	No-Go(0−500 ms)	3.64 ± 1.624	4.17 ± 1.57	0.33	0.14
	Go (500−1000 ms)	0.24 ± 0.220	0.43 ± 0.40	0.54	0.005*
	No-Go (500−1000 ms)	0.17 ± 1.10	0.13±1.07	0.12	0.22
Theta ITC	Go (0−500 ms)	0.31 ± 0.07	0.33 ± 0.11	0.24	0.39
	No-Go (0−500 ms)	0.48 ± 0.12	0.50 ± 0.10	0.18	0.35

Abbreviations: ADHD – Attention-Deficit/Hyperactivity Disorder, MRT – MeanReaction Time Variability, CE – commission errors, OE – omission errors, ERSP – Event-related spectral perturbations, ITC – inter-trial phase coherence.

Notes: *significant at p ≤ 0.035 FDR correction, **significant at p ≤ 0.001, Bold: d ≥ .80 indicating large effect size, Italics: d ≥ .50 indicating a medium effect size, d ≥ .20 indicating a small effect size.