WAIS-III index score profiles in the Canadian standardization sample

Abstract

Representative index score profiles were examined in the Canadian standardization sample of the Wechsler Adult Intelligence Scale-Third Edition (WAIS-III). The identification of profile patterns was based on the methodology proposed by Lange, Iverson, Senior, and Chelune (2002) that aims to maximize the influence of profile shape and minimize the influence of profile magnitude on the cluster solution. A two-step cluster analysis procedure was used (i.e., hierarchical and k-means analyses). Cluster analysis of the four index scores (i.e., Verbal Comprehension [VCI], Perceptual Organization [POI], Working Memory [WMI], Processing Speed [PSI]) identified six profiles in this sample. Profiles were differentiated by pattern of performance and were primarily characterized as (a) high VCI/POI, low WMI/PSI, (b) low VCI/POI, high WMI/PSI, (c) high PSI, (d) low PSI, (e) high VCI/WMI, low POI/PSI, and (f) low VCI, high POI. These profiles are potentially useful for determining whether a patient's WAIS-III performance is unusual in a normal population.

Cognitive, clinical, and functional characteristics of verbally superior schizophrenia patients.

“…Although such profiles may reflect illness-linked cognitive dysfunction, they also occur in the general population (Ryan, Tree, Morris, & Gontkovsky, 2006). For example, Lange (2007) found that 13% of healthy adults had relatively high verbal, but low nonverbal ability and visual motor processing speed. Moreover, earlier research established that 82% to 90% of neurological and psychiatric patients demonstrate cognitive performance patterns found in normal populations (Crockett, 1993; Ryan & Bohac, 1994).…”

Development and Reliability of the Indonesian Wechsler Adult Intelligence Scale—Fourth Edition (WAIS-IV)

“…Internationally, the WBIS has been extended and modified several times to WAIS, WAIS-R, WAIS-III, and the recently published WAIS-IV (Wechsler, 2008a(Wechsler, , 2008b. Adaptations from the original US versions of these tests have been published in many countries, such as the Netherlands (see Van der Heijden, Van den Bos, Mol, & Kessels, 2013), Japan (see Murayama, Iseki, Tagaya, Ota, Kanasuki, Fujishiro, Arai, & Sato, 2013), Finland (see Roivainen, 2013), France (see Lecerf, Golay, & Reverte, 2012), South Africa (see Grieve & Van Eeden, 2010), Canada (see Lange, 2007), Spain (see Melendez, 1994), and China (see Lynn & Dai, 1993). In the latest WAIS-IV items and subtests have been substantially revised, new subtests have been added and norms have been updated to take cohort effects into account (Wechsler, 2008b).…”

Assessment of neuropsychiatric manifestations in a cohort of intensive care unit survivors: A proof of concept study

“…However, of notice our study population was performing worse in the WAIS III cognitive test, when compared to a demographically matched background population. 10 A limitation in this study is the small number and proportions of participants, in addition to the lack of a control group. Additionally, loss to follow-up due to post-ICU mortality, incomplete test or lack of response to study invitation may skew our results, since we suspect that cognitive impairment is a direct factor leading to patients not participating or completing the interview.…”

“…However, of notice our study population was performing worse in the WAIS III cognitive test, when compared to a demographically matched background population. 10…”