Table 1.

Descriptive, demographic and behavioral summary statistics of each group in the final sample. Means are displayed with standard deviation in parentheses. All ratings scales reported in T-scores. For subtypes: H = Hyperactive, I = Inattentive, C = Combined. For comorbidities: MDD = Major Depressive Disorder, GAD = Generalized Anxiety Disorder, ODD = Oppositional Defiant Disorder, CD = Conduct Disorder. Frequentist inferences (p-value), Bayesian inferences (BF), and frequentist point estimates of effect size (d) were drawn from independent samples t-tests conducted in JASP.

	Control	ADHD	p	BF	d
N(Males:Females)	99(46:53)	209(140:69)	-	-
#Subtypes (H,I,C)		5,85,119	-	-
Age	10.23(1.26)	10.20(1.31)	.874	.14	.03
Estimated Full Scale IQ	103.79(7.61)	103.47(12.18)	.814	.14	.02
Hyperactivity/Impulsivity
Total # of symptoms	.28(.54)	5.49(2.93)	<.001	>10,000	2.14
Parent BASC-2	42.42(5.41)	65.03(13.69)	<.001	>10,000	1.93
Parent Conners	45.83(3.34)	67.09(14.12)	<.001	>10,000	2.69
Teacher BASC-2	43.74(3.42)	60.30(13.07)	<.001	>10,000	1.52
Teacher Conners	45.53(2.80)	59.45(12.41)	<.001	>10,000	1.35
Inattention
Total # of symptoms	0.54(.69)	8.02(1.30)	<.001	>10,000	6.59
Parent BASC-2	43.47(6.42)	66.62(6.72)	<.001	>10,000	3.50
Parent Conners	45.74(3.87)	70.12(10.68)	<.001	>10,000	2.69
Teacher BASC-2	43.52(5.36)	62.27(6.98)	<.001	>10,000	2.88
Teacher Conners	46.15(4.55)	60.35(11.37)	<.001	>10,000	1.46
Comorbidity (past year)
MDD	0	9	-	-	-
GAD	0	23	-	-	-
ODD/CD	3/0	82/15	-	-	-
Task Summary Statistics
Go Mean RT	0.771 (0.149)	0.818 (0.146)	.01	3.13	.32
Signal-Respond Mean RT	0.666 (0.119)	0.720 (0.125)	<.001	58.62	.44
Go Accuracy	0.976 (0.039)	0.949 (0.053)	<.001	2716.18	.56
Signal-Respond Accuracy	0.970 (0.051)	0.937 (0.069)	<.001	589.30	.52
Mean SSD	0.454 (0.180)	0.394 (0.204)	.012	2.66	.31
Mean SSRT Estimate	0.317 (0.105)	0.424 (0.162)	<.001	>10,000	.72
Overall P(response)	0.528 (0.060)	0.577 (0.099)	<.001	2012.00	.56