Bifactor model of WISC-IV: Applicability and measurement invariance in low and normal IQ groups.
This study examined the applicability and measurement invariance of the bifactor model of the 10 Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV) core subtests in groups of children and adolescents (age range from 6 to 16 years) with low (IQ ≤79; N = 229; % male = 75.9) and normal (IQ ≥80; N = 816; % male = 75.0) IQ scores. Results supported this model in both groups, and there was good support for measurement invariance for this model across these groups. For all participants together, the omega hierarchical and explained common variance (ECV) values were high for the general factor and low to negligible for the specific factors. Together, the findings favor the use of the Full Scale IQ (FSIQ) scores of the WISC-IV, but not the subscale index scores. (PsycINFO Database Record
School of Health Sciences and Psychology, Federation University Australia.
Rapson
R
Gomez
Academic Child Psychiatry, Department of Paediatrics, The University of Melbourne.
Alasdair
A
Vance
School of Health Sciences and Psychology, Federation University Australia.
Shaun
0000-0002-8112-9687
S
Watson
D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D007360:Intelligence; D008297:Male; D008960:Models, Psychological; D014888:Wechsler Scales / Q000706:statistics & numerical data*