TY - JOUR
T1 - Cross-Cultural Validation of the Cognitive Biases Questionnaire for Psychosis in Japan and Examination of the Relationships Between Cognitive Biases and Schizophrenia Symptoms
AU - Ishikawa, Ryotaro
AU - Ishigaki, Takuma
AU - Kikuchi, Akiko
AU - Matsumoto, Kazunori
AU - Kobayashi, Shigeru
AU - Morishige, Satori
AU - Hosono, Masahito
AU - Nakamura, Yasuhisa
AU - Kase, Akihiko
AU - Morimoto, Takafumi
AU - Haga, Daisuke
N1 - Funding Information:
This research was supported by Grant-in-Aid for Scientific Research (15H03455) of Japan Society for the Promotion of Science (JSPS). The authors express their gratitude to Mr Satoshi Eguchi (University of Tokyo) and Mr Hiroyasu Matubara (Shizuoka Psychiatric Medical Center) for their assistance with the questionnaire study.
Publisher Copyright:
© 2016, Springer Science+Business Media New York.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - The Cognitive Bias Questionnaire for Psychosis (CBQp) is a valid selfreport instrument for assessing cognitive biases in psychosis. To validate the Japanese version of the CBQp, and to investigate the relationships between CBQp and various schizophrenia symptoms, such as positive symptoms, negative symptoms, and disorganized/autistic preoccupation. Patients with schizophrenia (n = 111), patients with depression (n = 40), and healthy controls (n = 35) were recruited. Using these samples, the psychometric properties of the Japanese version of CBQp were tested. The CBQp total scores had good reliability while the two subscales had moderate reliability. Furthermore, the scales had adequate concurrent validity, given that it had significant correlations with positive symptoms, and could accurately distinguish between schizophrenia patients and healthy controls. Novel findings were that the CBQp total scores were positively correlated with disorganized/autistic preoccupation. Furthermore, this study using a Japanese sample showed marginally significant correlations between the cognitive biases of threating event and severity of delusions, while this relationship was not seen in a previous study that used a Western sample. This difference could be because of the ‘shame culture’, which is explained as a characteristic of Japanese. The Japanese version of the CBQp was as reliable and valid as the original.
AB - The Cognitive Bias Questionnaire for Psychosis (CBQp) is a valid selfreport instrument for assessing cognitive biases in psychosis. To validate the Japanese version of the CBQp, and to investigate the relationships between CBQp and various schizophrenia symptoms, such as positive symptoms, negative symptoms, and disorganized/autistic preoccupation. Patients with schizophrenia (n = 111), patients with depression (n = 40), and healthy controls (n = 35) were recruited. Using these samples, the psychometric properties of the Japanese version of CBQp were tested. The CBQp total scores had good reliability while the two subscales had moderate reliability. Furthermore, the scales had adequate concurrent validity, given that it had significant correlations with positive symptoms, and could accurately distinguish between schizophrenia patients and healthy controls. Novel findings were that the CBQp total scores were positively correlated with disorganized/autistic preoccupation. Furthermore, this study using a Japanese sample showed marginally significant correlations between the cognitive biases of threating event and severity of delusions, while this relationship was not seen in a previous study that used a Western sample. This difference could be because of the ‘shame culture’, which is explained as a characteristic of Japanese. The Japanese version of the CBQp was as reliable and valid as the original.
KW - Cognitive behavioural therapy
KW - Cognitive biases
KW - Cognitive biases questionnaire for psychosis
KW - Cognitive theory
KW - Schizophrenia
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U2 - 10.1007/s10608-016-9807-8
DO - 10.1007/s10608-016-9807-8
M3 - Article
AN - SCOPUS:84990879598
VL - 41
SP - 313
EP - 323
JO - Cognitive Therapy and Research
JF - Cognitive Therapy and Research
SN - 0147-5916
IS - 2
ER -