TABLE 4.

Descriptive statistics of the HRT 1-4 sample—clustered by subtests.

	Subgroup 1 (n = 43)						Subgroup 2 (n = 24)
	M	SD	Skewness	Kurtosis	Min.	Max.	M	SD	Skewness	Kurtosis	Min.	Max.
Intelligence	46.40	9.45	0.39	2.53	30.00	67.00	43.01	6.63	−0.16	2.61	30.00	55.33
Reading fluency	38.03	10.20	0.05	2.16	20.00	60.00	33.31	9.80	0.92	3.60	18.67	58.00
Matrix span	45.07	9.08	0.24	2.10	32.00	65.00	43.96	8.30	0.08	2.93	26.00	60.00
Dot enumeration	46.70	11.31	0.65	3.18	22.00	74.00	42.25	9.66	−0.03	1.88	27.00	58.00
Symbolic magnitude comparison	47.58	11.90	0.74	2.79	29.00	75.00	44.63	12.46	−0.02	2.12	22.00	65.00
Mixed magnitude comparison	46.88	12.44	0.40	2.86	22.00	75.00	47.42	11.50	0.03	2.11	26.00	69.00
Transcoding	49.91	5.72	−0.58	2.16	40.00	58.00	34.63	6.21	−0.11	2.13	22.00	44.00
Number sets	44.56	7.18	0.11	2.74	29.00	60.00	37.96	6.08	−0.13	2.11	26.00	49.00
Number line	48.00	8.12	0.57	2.85	36.00	69.00	35.75	4.61	0.96	4.19	29.00	49.00
Addition	44.70	6.70	0.58	2.90	34.00	60.00	35.04	6.54	0.30	2.97	24.00	51.00
Subtraction	43.07	6.39	0.79	4.62	30.00	65.00	34.67	5.35	−0.33	2.17	26.00	43.00
Multiplication mixed with place holder tasks	45.28	7.78	0.29	2.85	30.00	64.00	35.46	5.64	−0.52	2.81	24.00	45.00

All variables are T-standardized (mean = 50, SD = 10).