Measuring negative symptoms in patients with schizophrenia: reliability and validity of the Korean version of the Motivation and Pleasure Scale-Self-Report
Authors Kim J, Jang S, Park S, Yi J, Park J, Lee JS, Choi K, Lee S
Received 4 March 2016
Accepted for publication 17 March 2016
Published 11 May 2016 Volume 2016:12 Pages 1167—1172
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 2
Editor who approved publication: Professor Wai Kwong Tang
Ji-Sun Kim,1 Seon-Kyeong Jang,1 Seon-Cheol Park,2 Jung-Seo Yi,3 Joong-Kyu Park,4 Jung Suk Lee,5 Kee-Hong Choi,6 Seung-Hwan Lee1,7
1Clinical Emotion and Cognition Research Laboratory, Goyang, 2Department of Psychiatry, Inje University Haeundae Paik Hospital, Busan, 3Department of Psychiatry, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, 4Department of Rehabilitation Psychology, Daegu University, Daegu, 5Department of Psychiatry, National Health Insurance Service Ilsan Hospital, Goyang, 6Department of Psychology, Korea University, Seoul, 7Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea
Background: The Clinical Assessment Interview for Negative Symptoms (CAINS) is one of the validated interview measures of negative symptoms in psychotic disorders. The Motivation and Pleasure Scale-Self-Report (MPSR) is a self-report measure that assesses the motivation and pleasure domains of negative symptoms based on the CAINS. This study evaluated the reliability and validity of a Korean version of the MPSR.
Methods: A total of 139 patients with schizophrenia completed the MPSR, CAINS, Scale for the Assessment of Negative Symptoms (SANS), Brief Psychiatric Rating Scales, Calgary Depression Scale for Schizophrenia, and other measures of trait and cognitive function.
Results: The 15-item MPSR showed good internal consistency. In addition, it also had a good convergent validity with the Motivation and Pleasure subscale of the CAINS and the anhedonia/avolition subscale of the SANS. The scale was not associated with psychotic symptoms, agitation/mania, and depression/anxiety, and it showed good discriminant validity. MPSR scores were significantly correlated with Behavioral Activation System total score for trait measure.
Conclusion: The Korean version of the MPSR is a notable self-report method for examining the severity of negative symptoms in schizophrenia.
Keywords: Korean version of the MPSR, CAINS, negative symptoms, reliability, validity
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