WAIS-R factors and performance on the Luria-Nebraska's intelligence, Memory, and Motor Scales: A canonical model of relationships

Abstract

The pattern and level of performance on the WAIS‐R and the Luria‐Nebraska's Intelligence, Memory, and Motor Scales were examined for 93 neurologically impaired adults. Maximum likelihood factor analyses of the W AIS‐ R indicated the presence of strongly correlated (.72) Verbal Commprehension and Perceptual Organization dimensions. Comparisons of these factors to those of the standardization group revealed an acceptable level of similarity (.94) for Verbal Comprehension, but not for Perceptual Organization (.53). Canonical correlations between WAIS‐R factor scores and the three Luria‐Nebraska scaled scores accounted for 82% of the total variance. Each set of procedures evidently is indexing the same theoretical constructs. Implications of these findings for our understanding of the measurement models that underlie clinical neuropsychology are discussed.

WAIS factor pattern for neuropsychiatric inpatients

“…Even though the level of performance is clearly lower for these patients, the pattern of variability is not. This finding is not entirely unexpected because it has been reported for other clinically impaired patients (e.g., Fowler et al, 1980). The results of the factor analyses of the WAIS's correlation matrix are displayed in Table 3.…”

“…The dimensions displayed in Table 3 are the familiar ones of Verbal Comprehension and Perceptual Organization. These factors have been reported previously and extensively for the WAIS in a wide variety of clinical samples (e.g., Fowler et al, 1980;Leckliter, Matarazzo, & Silverstein, 1986;Matarazzo, 1972). The variables that contribute to Verbal Comprehension are those of the WAIS's Verbal Scale, while the loadings on Perceptual Organization are those predominantly from the Performance Scale.…”

“…In the present study, we present a structural model of the WAIS for a sample of chronically disabled neuropsychiatric inpatients, for whose data we have used factor analyses to reduce the dimensionality of the WAIS's correlation matrix in order to provide evidence for the existence of underlying abilities in terms of their latent facets (Hill, Reddon, & Jackson, 1985). Previous research on the factor structure of the Wechsler scales (e.g., Cohen, 1952aCohen, , 1952bCohen, , 1957aCohen, , 1957bDennerll, den Broeder, & Sokolov, 1964;Fowler, Richards, & Boll, 1980;Matarazzo, 1972) led us to expect that a two-or three-factor model that revealed the presence of Verbal Comprehension and Perceptual Organization factors and, in the instance of the three-factor model, an additional dimension often labeled Freedom-from-distractibility, would be adequate to summarize the intercorrelations among the 11 WAIS subtests. The empirical stability of the first two factors appears to be particularly well documented for a variety of clinical populations, e.g., those with chronic cerebral dysfunction, epilepsy, and lateralized as well as diffuse neurological impairment (Zimmerman, Whitmyre, & Fields, 1970).…”

Development and psychometric validation of the Task-Specific Self-Efficacy Scale for Chinese people with mental illness

“…Canonical correlation analysis has been used in a variety of published research. For example, canonical correlation analysis was used to examine the multidimensional relationships between intellectual abilities and demographic characteristics (Chastain and Joe, 1987), relationships between the two different intelligence tests (Estabrook, 1984), relationships between intelligence factors and performance on neuropsychological measures (Fowler and Macciocchi, 1986), and career indecision and anxiety (Fuqua et al, 1987).…”