Table 3

Comparisons of performance factors on the Conner’s Continuous Performance Test between youths with ADHD and controls

	Group, mean ± SD

Factor	ADHD (n = 50)	Control (n = 50)	t	p value	Cohen d
Focused attention
Omission	11.12 ± 11.97	4.02 ± 4.71	3.9	< 0.001	0.78
RT SE	12.20 ± 7.08	6.72 ± 3.27	5.21	< 0.001	0.99
Variability	26.24 ± 19.54	11.16 ± 9.84	4.99	< 0.001	0.98
Detectability	0.338 ± 0.364	0.52 ± 0.356	−3.03	0.004	−0.51
Impulsivity
Commission	23.04 ± 7.75	18.62 ± 8.02	3.5	0.001	0.56
Reaction time	408.92 ± 90.25	375.79 ± 56.71	2.33	0.024	0.44
Response style	0.622 ± 0.377	0.778 ± 2.389	−0.47	0.64	−0.09
Perseveration	14.98 ± 20.26	3.22 ± 6.42	4.02	< 0.001	0.78
Sustained attention
RT block change	0.023 ± 0.036	0.007 ± 0.025	2.62	0.012	0.52
RT SE block change	0.107 ± 0.095	0.046 ± 0.065	3.77	< 0.001	0.75
Vigilance
RT ISI change	0.098 ± 0.048	0.064 ± 0.031	4.23	< 0.001	0.84
RT SE ISI change	0.121 ± 0.188	0.059 ± 0.126	1.94	0.06	0.39

ADHD = attention-deficit/hyperactivity disorder; ISI = interstimulus interval; RT = reaction time; SD = standard deviation; SE = standard error.