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Elliott, Colin D.; Hale, James B.; Fiorello, Catherine A.; Dorvil, Cledicianne; Moldovan, Jaime – Psychology in the Schools, 2010
This study investigated the effects of broad cognitive abilities derived from the Cattell-Horn-Carroll (CHC) taxonomy, together with the effect of the general factor ("g"), on Wechsler Individual Achievement Test, Second Edition (WIAT-II) reading achievement. Structural equation modeling (SEM) and commonality analyses were applied to the…
Descriptors: Cognitive Ability, Reading Achievement, Structural Equation Models, Cognitive Tests
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Calhoun, Susan L.; Mayes, Susan Dickerson – Psychology in the Schools, 2005
The Processing Speed Index (PSI) was first introduced on the Wechsler Intelligence Scale, Third Edition (WISC-III; D. Wechsler, 1991), and little is known about its clinical significance. In a referred sample (N = 980), children with neurological disorders (ADHD, autism, bipolar disorder, and LD) had mean PSI and Freedom from Distractibility Index…
Descriptors: Intelligence Tests, Intelligence Quotient, Cognitive Processes, Comprehension