Factor Structure of the Wechsler Intelligence Scale for Children: Fourth Edition in Children with ADHD.
OBJECTIVE
Recent evidence suggests that the factor structure of the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV) is better explained by a five-factor model rather than the four-factor model in the standardization sample. The current study examined the WISC-IV's factor structure in a sample of children with ADHD.


METHODS
Participants included 314 children and adolescents who were diagnosed with ADHD. Confirmatory factor analysis was conducted on the 10 core subtests of the WISC-IV, and three models were examined including two based on Cattell-Horn-Carroll (CHC) theory.


RESULTS
A five-factor model consisting of Gc, Gf, Gv, Gsm, and Gs factors provided the best fit for the data. The Perceptual Reasoning factor identified in the original four-factor model split into the two CHC factors, Gf and Gv, and cross-loaded the Symbol Search subtest onto the Gv factor.


CONCLUSIONS
A five-factor model based on CHC theory provided superior fit for the WISC-IV in children with ADHD, as has been found with the standardization sample.
University of Nevada, Las Vegas, NV, USA.
Nicholas S
NS
Thaler
University of Nevada, Las Vegas, NV, USA.
Kimberly A
KA
Barchard
University of Nevada, Las Vegas, NV, USA.
Elyse
E
Parke
University of Nevada, Las Vegas, NV, USA.
W Paul
WP
Jones
University of Nevada, Las Vegas, NV, USA.
Lewis M
LM
Etcoff
University of Nevada, Las Vegas, NV, USA daniel.allen@unlv.edu.
Daniel N
DN
Allen
D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis* / Q000523:psychology; D002648:Child; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D011594:Psychometrics / Q000706:statistics & numerical data*; D014888:Wechsler Scales / Q000592:standards*