Table 1.

ACCOMS+ vs. ACCOMS− Group Differences: Independent Groups T-tests

	Group
	ACCOMS+ (n = 60)		ACCOMS− (n = 36)
	M	SD	M	SD	df	t	p	Cohen’s d
Grade	5.717	0.214	5.639	0.271	94	−0.224	.823	0.046
Maternal education	5.000	0.177	5.286	0.190	90	1.055	.294	0.222
CLDQ reading mean	2.901	1.106	2.364	0.877	94	−2.414	.015	0.512
CLDQ math mean	3.161	1.156	2.921	1.281	94	−0.945	.347	0.195
FSIQ	88.552	2.733	101.143	2.163	41	2.979	.005	0.930
VIQ	94.133	2.353	104.467	2.195	43	2.807	.008	0.856
PIQ	95.967	3.002	101.667	2.386	43	1.243	.221	0.379
ADHD IA item sum	21.133	0.540	20.528	0.674	94	−0.695	.489	0.143
ADHD H/I item sum	13.533	0.837	15.000	1.006	94	1.101	.274	0.227
MSA reading score	410.153	5.435	416.389	6.423	93	0.727	.469	0.151
MSA math score	412.644	4.989	424.944	6.392	93	1.517	.133	0.315

Note. FSIQ = Full Scale IQ from an individually-administered IQ test, VIQ = language-based IQ score from an individually administered PIQ = visually based IQ score from an individually administered IQ test, ADHD IA item sum = sum of scores on inattentive items IV, ADHD H/I sum = sum of scores on hyperactive/impulsive items from ADHD-RS-IV, MSA = Maryland School Assessment