Premium
Brief Assessment of Cognition in Schizophrenia: Validation of the Japanese version
Author(s) -
KANEDA YASUHIRO,
SUMIYOSHI TOMIKI,
KEEFE RICHARD,
ISHIMOTO YASUHITO,
NUMATA SHUSUKE,
OHMORI TETSURO
Publication year - 2007
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.2007.01725.x
Subject(s) - neurocognitive , cognition , psychology , cronbach's alpha , varimax rotation , verbal fluency test , audiology , memory span , cognitive test , verbal memory , trail making test , working memory , neuropsychological test , psychometrics , clinical psychology , neuropsychology , psychiatry , medicine
This preliminary study was performed to test the reliability and validity of the Brief Assessment of Cognition in Schizophrenia (BACS) as an assessment tool in a Japanese‐language version (BACS‐J). The subjects for the present study were 30 outpatients with chronic schizophrenia. Each subject gave written informed consent to participate in the research. Cronbach's alpha for the BACS‐J was 0.77. The BACS‐J composite score was significantly correlated with all primary measures of BACS‐J (verbal memory, working memory, motor speed, verbal fluency, attention, and executive function). All BACS‐J primary measures and the composite score were significantly correlated between two assessments. The mean score of the Digit Sequencing Task and composite score on the second assessment were significantly larger than those on the first assessment. All BACS‐J primary measures except the Symbol Coding Task were significantly correlated with relevant standard neurocognitive tests. Also, the BACS‐J composite score was significantly correlated with all standard neurocognitive tests except the Continuous Performance Test. A principal components analysis with varimax rotation resulted in a three‐factor solution (executive function and memory; motor speed and general cognitive functions; and working memory). This preliminary study indicates that the BACS‐J is a reliable and practical scale to evaluate cognitive function.