A factor analysis of the Wechsler Adult Intelligence Scale 3rd Edition (WAIS-III) in a low IQ sample

Hdl Handle:
http://hdl.handle.net/10149/97660
Title:
A factor analysis of the Wechsler Adult Intelligence Scale 3rd Edition (WAIS-III) in a low IQ sample
Authors:
Jones, J. J. S. (Jill); van Schaik, P. (Paul) ( 0000-0001-5322-6554 ) ; Witts, P. (Paul)
Affiliation:
University of Teesside. School of Social Sciences and Law; Tees and North East Yorkshire NHS Trust.
Citation:
Jones, J.J.S., van Schaik, P. and Witts, P. (2006) 'A factor analysis of the Wechsler Adult Intelligence Scale 3rd Edition (WAIS-III) in a low IQ sample', British Journal of Clinical Psychology, 45(2), pp.145-152.
Publisher:
British Psychological Society
Journal:
British Journal of Clinical Psychology
Issue Date:
Jun-2006
URI:
http://hdl.handle.net/10149/97660
DOI:
10.1348/014466505X29134
Abstract:
Objectives. Previous factor analytic studies of the WAIS, WAIS-R and WAIS-III used standardization samples, (representing the general population), clinical populations (e.g. psychiatric) and 'non-clinical' groups (e.g. older adults). These studies endorsed the reliability of the scales in such samples and supported theoretical models of intelligence. The WAIS-III (1997) includes four Indexes based on factor analysis, which provide clinically useful information to practitioners, but have not been validated in a low IQ population. However, the WAIS-III is often administered to individuals with suspected or proven low IQ, as it offers service providers, legislators and the Department of Health with a reliable measure of IQ. The aim of this study was to investigate the factor structure of the WAIS-III in a low IQ sample. Methods. WAIS-III data was collected from assessments carried out in routine clinical practice from individuals with a full scale IQ of 74 or below (n=105). The data were subjected to factor analysis, using two types of factor analysis: principal axis factoring and principal components analysis. Orthogonal and oblique rotations were applied to the analyses. Results. Only one robust solution could be extracted. This contained two factors, analogous to traditional verbal and performance sub-scales. Conclusions. This study does not support the four-factor solution which underlies WAIS-III index scores in a low IQ population.
Type:
Article
Language:
en
Keywords:
intelligence tests; intelligence levels; Wechsler Adult Intelligence Scale; psychometrics; psychological tests
ISSN:
0144-6657
Rights:
Subject to restrictions, author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 29/04/10]
Citation Count:
2 [Scopus, 29/04/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorJones, J. J. S. (Jill)en
dc.contributor.authorvan Schaik, P. (Paul)en
dc.contributor.authorWitts, P. (Paul)en
dc.date.accessioned2010-04-29T10:31:13Z-
dc.date.available2010-04-29T10:31:13Z-
dc.date.issued2006-06-
dc.identifier.citationBritish Journal of Clinical Psychology; 45(2):145-152en
dc.identifier.issn0144-6657-
dc.identifier.doi10.1348/014466505X29134-
dc.identifier.urihttp://hdl.handle.net/10149/97660-
dc.description.abstractObjectives. Previous factor analytic studies of the WAIS, WAIS-R and WAIS-III used standardization samples, (representing the general population), clinical populations (e.g. psychiatric) and 'non-clinical' groups (e.g. older adults). These studies endorsed the reliability of the scales in such samples and supported theoretical models of intelligence. The WAIS-III (1997) includes four Indexes based on factor analysis, which provide clinically useful information to practitioners, but have not been validated in a low IQ population. However, the WAIS-III is often administered to individuals with suspected or proven low IQ, as it offers service providers, legislators and the Department of Health with a reliable measure of IQ. The aim of this study was to investigate the factor structure of the WAIS-III in a low IQ sample. Methods. WAIS-III data was collected from assessments carried out in routine clinical practice from individuals with a full scale IQ of 74 or below (n=105). The data were subjected to factor analysis, using two types of factor analysis: principal axis factoring and principal components analysis. Orthogonal and oblique rotations were applied to the analyses. Results. Only one robust solution could be extracted. This contained two factors, analogous to traditional verbal and performance sub-scales. Conclusions. This study does not support the four-factor solution which underlies WAIS-III index scores in a low IQ population.en
dc.language.isoenen
dc.publisherBritish Psychological Societyen
dc.rightsSubject to restrictions, author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 29/04/10]en
dc.subjectintelligence testsen
dc.subjectintelligence levelsen
dc.subjectWechsler Adult Intelligence Scaleen
dc.subjectpsychometricsen
dc.subjectpsychological testsen
dc.titleA factor analysis of the Wechsler Adult Intelligence Scale 3rd Edition (WAIS-III) in a low IQ sampleen
dc.typeArticleen
dc.contributor.departmentUniversity of Teesside. School of Social Sciences and Law; Tees and North East Yorkshire NHS Trust.en
dc.identifier.journalBritish Journal of Clinical Psychologyen
ref.citationcount2 [Scopus, 29/04/2010]en
or.citation.harvardJones, J.J.S., van Schaik, P. and Witts, P. (2006) 'A factor analysis of the Wechsler Adult Intelligence Scale 3rd Edition (WAIS-III) in a low IQ sample', British Journal of Clinical Psychology, 45(2), pp.145-152.en
All Items in TeesRep are protected by copyright, with all rights reserved, unless otherwise indicated.