Jones Jill J S, van Schaik Paul, Witts Paul
Doctoral Programme in Clinical Psychology, University of Teesside, UK.
Br J Clin Psychol. 2006 Jun;45(Pt 2):145-52. doi: 10.1348/014466505X29134.
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.
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.
Only one robust solution could be extracted. This contained two factors, analogous to traditional verbal and performance sub-scales.
This study does not support the four-factor solution which underlies WAIS-III index scores in a low IQ population.
以往对韦氏成人智力量表（WAIS）、韦氏成人智力量表修订版（WAIS-R）和韦氏成人智力量表第三版（WAIS-III）进行的因素分析研究使用了标准化样本（代表普通人群）、临床样本（如精神病患者）和“非临床”群体（如老年人）。这些研究认可了这些量表在这类样本中的可靠性，并支持了智力理论模型。WAIS-III（1997）包括基于因素分析的四个指数，为从业者提供了临床有用信息，但尚未在低智商人群中得到验证。然而，WAIS-III经常被用于对疑似或已证实低智商的个体进行测试，因为它为服务提供者、立法者和卫生部提供了一种可靠的智商测量方法。本研究的目的是调查WAIS-III在低智商样本中的因素结构。
从常规临床实践中对全量表智商为74或以下的个体（n=105）进行评估所收集的WAIS-III数据。使用两种因素分析方法对数据进行因素分析：主轴因素分析和主成分分析。分析采用正交和斜交旋转。
只能提取出一个稳健的解决方案。它包含两个因素，类似于传统的言语和操作分量表。
本研究不支持WAIS-III指数分数在低智商人群中所依据的四因素解决方案。
