In the literature, exploratory factor-analytic studies of the WAIS,WAIS-R, and WAIS-III
have generally had one of two aims. First, research has aimed to define intelligence itself,
in terms of measurable components in a test. Secondly, research has been carried out in
order to validate the scale in different nations, groups, and clinical populations, and
sometimes to develop different ways of interpreting the test for different groups. There
are a number of studies that have investigated the factor structure of the WAIS and
WAIS-R in a range of populations. It is beyond the scope of the current paper to examine
this, however, useful reviews can be found in Leckliter, Matarazzo, and Silverstein
(1986), Hill, Reddon, and Jackson (1985), and Enns and Reddon (1998).