Previous studies found that patients with schizophrenia tend to have higher VIQ than PIQ. However, studies showed that the short-form WAIS-III could efficiently estimate the VIQ, PIQ and FSIQ, but there had been little data on the short form’s effectiveness in quickly evaluating performances on Verbal Comprehension, Perceptual Organization, Working Memory, and Processing Speed indexes. The use of short-form WAISIII is an efficient method to get a quick estimate of the intellectual functioning. Sattler and Ryan found the FSIQ, VIQ and PIQ scores in the full WAISIII and short-form WAIS-III had fairly good correlations. Short-form WAIS-III includes the subtests of Information, Digit Span, Arithmetic, Similarities, Picture Completion, Block Design, and Digit Symbol. The model was adopted and modified into WAIS-III. proposed the sevensubtest short form for the WAIS-R. Therefore, the short-form WAIS was developed. The full WAIS requires a significant length of time. The reliability of the Chinese version of the WAIS-III had been confirmed through a standardization study. Processing Speed index measures the ability to perform given tasks quickly and efficiently based on the presented information. Working Memory index measures the ability to retain information temporarily to perform a designated task. Perceptual Organization index measures non-verbal thinking, such as the manipulation of designs and pictures, fluid reasoning, and spatial processing. Verbal Comprehension index measures the ability of oral explanations and abstract concepts. It provides three IQ scores: Full-Scale IQ (FSIQ), Verbal IQ (VIQ), and Performance IQ (PIQ), and four indexes: Verbal Comprehension, Perceptual Organization, Working Memory, and Processing Speed. WAIS-III includes 11 core subtests and 3 supplemental subtests. The Wechsler Adult Intelligence Scale-III (WAISIII) has been updated from the Wechsler Adult Intelligence Scale-Revised (WAIS-R). The Wechsler Adult Intelligence Scale (WAIS) has been used extensively to assess cognitive functions in patients with schizophrenia for both research and clinical practices. Therefore, it is important to further investigate the cognitive impairments in patients with schizophrenia in order to improve their cognitive rehabilitation and to enhance their social adjustment. Cognitive impairments in patients with schizophrenia were also known to affect their daily activities, social abilities, and community functioning. Previous studies showed that patients with schizophrenia experienced cognitive impairment, such as deteriorations in attention functions, memory, language, executive functions and general intelligence. Schizophrenia is a functional disability of the brain. KeywordsĬognitive function, WAIS-III, Schizophrenia, Working memory index, Perceptual Organization Introduction Furthermore, Working Memory index needs to be taken into account when applied in rehabilitation. However, no significant deficit of Working Memory index was observed in this study, which may indicate that Working Memory index was affected by illness duration.Ĭonclusions:The short-form WAIS-III may have clinical potential for assessment of global cognitive profile of schizophrenia. Moreover, the scores of four indexes from high to low were Verbal Comprehension, Working Memory, Perceptual Organization, and Processing Speed. The results showed that patients with schizophrenia generally had low scores in the short-form WAIS-III, especially in FSIQ, PIQ and Processing Speed index, in agreement with previous research. The test provided scores for VIQ, PIQ, and FSIQ, along with four secondary indexes (Verbal Comprehension, Working Memory, Perceptual Organization, and Processing Speed). Each participant received the short-form WAIS-III consisting of seven core subtests. Methods and Findings: Thirty-four patients diagnosed with schizophrenia were recruited from the medical centre. This study aimed to validate the short-form WAIS-III in efficiently assessing global cognitive profile of the patients with schizophrenia. The Wechsler Adult Intelligence Scale (WAIS) has been used extensively to assess cognitive function in schizophrenia in research and clinical practice. Chia-Ju Lin 1, 2, Chin-Chuen Lin 1, Yi-Yung Hung 1, Meng-Chang Tsai 1, Shih-Chun Ho 1, Ya-Ling Wang 1, Ming-Che Tsai 1, Ming-Hsiung Liu 1, Yung-Hsuan Lee 1 and Tiao-Lai Huang 1, *ġ Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROCĢ Shih Chien University, Kaohsiung Campus, Kaohsiung, Taiwan, ROC Corresponding Author: Tiao-Lai Huang, MDĭepartment of Psychiatry, Kaohsiung Chang Gung Memorial Hospital, 123, Ta-Pei Rd, Niao- Sung, Kaohsiung 833, Taiwan, ROCīackground: Schizophrenia is associated with cognitive impairment.
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