A Confirmatory Factor Analysis of the WAIS—III in Patients with Traumatic Brain Injury

Abstract

Maximum likelihood confirmatory factor analysis was performed on the WAIS-III data of a sample of 166 patients with traumatic brain injury (TBI). Four competing hypothetical models were tested for model fit and parsimony. A four-factor model composed of Verbal Comprehension, Perceptual Organization, Working Memory, and Processing Speed, identical to that proposed for the standardization sample, provided the best fit to the clinical data. The results support the construct validity of these four factors in patients with TBI.

Replication of factor structure of Wechsler Adult Intelligence Scale‐III Chinese version in Chinese mainland non‐clinical and schizophrenia samples

“…3 This also appears to be the case for patients with TBI and schizophrenia. 11,12 This result was replicated in the present study in Chinese patients with schizophrenia with the WAIS-III Chinese version.…”

“…7 There have been some previous studies testing whether the WAIS-III four-factor structure can generalize across clinical boundaries: Ryan and Paolo further supported the validity of the four-factor structure by using exploratory factor analysis (EFA) of data from a wide range of clinical samples such as substance use disorders, and psychiatric disorders; 10 and Heijden and Donders supported the construct validity of these four factors in patients with traumatic brain injury (TBI), using CFA. 11 Nevertheless, so far there is a paucity of research concerning the construct validity of WAIS-III in clinical samples of adult patients with schizophrenia. In the examination of factor structure of WAIS-III in a schizophrenia sample, Dickinson et al used both EFA and CFA to indicate that the four-factor WAIS-III presented a significant improvement over other competing models but did not improve significantly over the fivefactor model in a schizophrenia sample.…”

Neuropsychological Studies of Mild Traumatic Brain Injury: A Meta-Analytic Review of Research Since 1995

“…Supported by factor analytic research, one main difference between the revised (Wechsler, 1981;Wechsler, 1987) and third editions of these measures is that the third editions provide estimates of Working Memory and Speed of Processing Index scores (see e.g., Tulsky & Price, 2003;van der Heidjen & Donders, 2003). With regard to processing speed, there has been a trend that recent studies include measures of reaction time and general speed of processing.…”

Predictive Value of Traditional Measures of Executive Function on Broad Abilities of the Cattell–Horn–Carroll Theory of Cognitive Abilities

“…Generalizing results must be done with great caution. Fortunately, studies on measurement invariance across clinical and healthy samples are promising (Jewsbury et al, 2016;Van der Heijden & Donders, 2003;Weiss et al, 2013), demonstrating the robustness of the CHC model in clinical populations. In that respect, future research could further examine current results by investigating different diagnostic groups.…”