Response inhibition deficits in externalizing child psychiatric disorders: An ERP-study with the Stop-task

Table 5 Effect size (Cohen's d) for the main dependent variables

		Controls (N)	AD/HD (A)	AD/HD+ODD/CD (AO)	ODD/CD (O)
Measure		effect-size d _sc ^a	effect-size d _sc ^a	effect-size d _sc ^a	effect-size d _sc ^a
Stop-failure reaction-time (ms)	A	-1.26*
	AO	-1.22*	.03
	O	-.87*	.39	.36
SSRT at 250 ms SSD (ms)	A	-.91*
	AO	.06	.96*
	O	-1.08*	-.18	-1.13*
Go-Trial ROI^b mean amplitude (μV)	A	-.29
	AO	-.57	-.28
	O	-.60	-.31	-.02
Stop-Trial ROI^b mean amplitude (μV)	A	-1.16*
	AO	-.93*	.22
	O	-1.15*	.01	-.20
Stop-N200 ROI^b mean amplitude (μV)	A	-1.15*
	AO	-.66	.49
	O	-.89+	.26	-.22

^a d_sc is the standardized mean difference for the sample, based on the ANCOVA model with age as covariate. This is done in order to account for developmental effects.
^b Region of interest, mean of electrodes F4 and F8 at 420-500 ms post Go-signal onset
* one-tailed, P < 0.05
+ one-tailed, P < 0.10

ISSN: 1744-9081