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Structure of the Wechsler Intelligence Scale for Children--Fourth Edition among a national sample of referred students.
MedLine Citation:
PMID:  21133545     Owner:  NLM     Status:  In-Process    
The structure of the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV; D. Wechsler, 2003a) was analyzed via confirmatory factor analysis among a national sample of 355 students referred for psychoeducational evaluation by 93 school psychologists from 35 states. The structure of the WISC-IV core battery was best represented by four first-order factors as per D. Wechsler (2003b), plus a general intelligence factor in a direct hierarchical model. The general factor was the predominate source of variation among WISC-IV subtests, accounting for 48% of the total variance and 75% of the common variance. The largest 1st-order factor, Processing Speed, only accounted for 6.1% total and 9.5% common variance. Given these explanatory contributions, recommendations favoring interpretation of the 1st-order factor scores over the general intelligence score appear to be misguided.
Marley W Watkins
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Psychological assessment     Volume:  22     ISSN:  1939-134X     ISO Abbreviation:  Psychol Assess     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8915253     Medline TA:  Psychol Assess     Country:  United States    
Other Details:
Languages:  eng     Pagination:  782-7     Citation Subset:  IM    
School Psychology Program, Arizona State University, Tempe, AZ 85287-1811, USA.
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