Table 1.

Distributional Characteristics of the Manifest Variables in the Factor Analysis

Measures	M	SD	Skew	Kurtosis
Rapid letter naminga	44.0	15.9	.003	−.026
Rapid sound naminga	30.3	11.9	.000	−.014
Rapid automatized naming—Lettersb	9.7	3.1	.005	−.025
Rapid automatized naming—Numbersb	9.5	2.8	.002	−.013
Elisionb	10.1	2.9	−.009	−.028
Sound matchingb	9.9	2.3	−.029	.102
Oral vocabularyc	96.8	14.2	.000	−.019
Dynamic assessmentd	9.7	3.6	−.128	–.399
Listening comprehensionc	95.6	16.5	.005	–.061
Attentive behaviord	37.4	12.8	–.009	–.074
Hyperactive or impulsive behaviord	37.7	13.1	−.030	−.169
IQc	98.5	14.9	.001	−.013

Note: N = 318.

^aItems per second.

^bScaled scores (M = 10, SD = 3).

^cStandard scores (M = 100, SD = 15).

^dRaw scores.