title: Usefulness of the Wechsler Intelligence Scale short form for assessing functional outcomes in patients with schizophrenia.
abstract: The Wechsler Adult Intelligence Scale (WAIS) has been widely used to assess intellectual functioning not only in healthy adults but also people with psychiatric disorders. The purpose of the study was to develop an optimal WAIS-3 short form (SF) to evaluate intellectual status in patients with schizophrenia. One hundred and fifty patients with schizophrenia and 221 healthy controls entered the study. To select subtests for SFs, following criteria were considered: 1) predictability for the full IQ (FIQ), 2) representativeness for the IQ structure, 3) consistency of subtests across versions, 4) sensitivity to functional outcome measures, 5) conciseness in administration time. First, exploratory factor analysis (EFA) and multiple regression analysis were conducted to select subtests satisfying the first and the second criteria. Then, candidate SFs were nominated based on the third criterion and the coverage of verbal IQ and performance IQ. Finally, the optimality of candidate SFs was evaluated in terms of the fourth and fifth criteria. The results suggest that the dyad of Similarities and Symbol Search was the most optimal satisfying the above criteria.
authors: Faculty of Human Development and Culture, Fukushima University, Fukushima, Fukushima, Japan. Electronic address: sumiyoshi@educ.fukushima-u.ac.jp.
authors: Chika
authors: C
authors: Sumiyoshi
authors: Graduate School of Human Sciences, Osaka University, Suita, Osaka, Japan.
authors: Haruo
authors: H
authors: Fujino
authors: Department of Clinical Epidemiology, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
authors: Tomiki
authors: T
authors: Sumiyoshi
authors: Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Yuka
authors: Y
authors: Yasuda
authors: Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Hidenaga
authors: H
authors: Yamamori
authors: Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Kazutaka
authors: K
authors: Ohi
authors: Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Michiko
authors: M
authors: Fujimoto
authors: Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University, Suita, Osaka, Japan.
authors: Masatoshi
authors: M
authors: Takeda
authors: Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University, Suita, Osaka, Japan.
authors: Ryota
authors: R
authors: Hashimoto
mesh_terms: D000328:Adult; D060825:Cognitive Dysfunction / Q000175:diagnosis* / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012559:Schizophrenia / Q000150:complications / Q000175:diagnosis*; D014888:Wechsler Scales / Q000592:standards*
keywords: Functional outcomes; Schizophrenia; Short form; Wechsler Intelligence Scale