Structure of the Wechsler Intelligence Scale for Children - Fourth Edition in a Group of Children with ADHD.
OBJECTIVE
This study used confirmatory factor analysis to examine the factor structure for the 10 core WISC-IV subtests in a group of children (N = 812) with ADHD.


METHODS
The study examined oblique four- and five-factor models, higher order models with one general secondary factor and four and five primary factors, and a bifactor model with a general factor and four specific factors.


RESULTS
The findings supported all models tested, with the bifactor model being the optimum model. For this model, only the general factor had high explained common variance and omega hierarchical value, and it predicted reading and arithmetic abilities.


CONCLUSIONS
The findings favor the use of the FSIQ scores of the WISC-IV, but not the subscale index scores.
School of Health Sciences and Psychology, Federation University Australia, Ballarat VIC, Australia.
Rapson
R
Gomez
Academic Child Psychiatry Unit, Department of Paediatrics, University of Melbourne, Melbourne VIC, Australia.
Alasdair
A
Vance
School of Health Sciences and Psychology, Federation University Australia, Ballarat VIC, Australia.
Shaun D
SD
Watson
ADHD; WISC-IV; academic performance; bifactor model; factor structure