Table 2.

Means, Standard deviations, and statistical test for each group and for each WISC subtest.

	ADHD-I		ADHD-C		ADHD-H		TD
	M	SD	M	SD	M	SD	M	SD	F	P	D.F
Full scale WISC	89.4	9.68	98.6	8.65	114.6	18.59	103.44	17.59	6.22	0.001	3.59
Verbal IQ	74.70	10.31	98.3	6.68	113.5	18.76	98.37	20.48	8.87	0.001	3.59
Information	4.3	1.76	7.8	2.09	11.6	3.5	8.85	3.51	9.88	0.001	3.59
Similarities	6.9	5.13	12.3	2.26	15.8	2.69	12.03	4.66	7.81	0.001	3.59
Arithmetic	7.4	1.07	9.6	2.11	10.8	3.32	9.55	2.91	2.88	0.044	3.59
Vocabulary	4.6	3.34	8.4	4.45	12.1	6.24	8.44	7.1	3.32	0.026	3.59
Comprehension	7.02	4.26	10.7	2.83	10.7	2.98	9.88	3.66	2.21	0.097	3.59
Performance IQ	102.6	12.21	99.5	17.48	114.7	15.84	108.59	14.25	2.15	0.105	3.59
Picture completion	7.9	3.87	9	1.82	11.4	2.45	10	2.51	3.16	0.052	3.59
Picture arrangement	11.8	2.52	11.7	5.16	13.6	4.69	11	3.43	1.08	0.362	3.59
Block design	11.7	3.05	10.1	4.14	12.8	3.96	12.03	4.01	0.89	0.45	3.59
Object assembly	11.7	2.9	10.3	1.05	12.8	2.61	11.81	2.61	1.73	0.17	3.59
Symbol search	8.9	2.42	8.7	3.4	10.1	2.6	11.48	2.76	3.53	0.021	3.59