The Korean version of the University of California San Diego Performance-based Skills Assessment: Reliability and Validity
Sung-Jin Kim 1, Jung-Min Kim 1, Joo-Cheol Shim 2, Beom-Joo Seo 3, Sung-Soo Jung 4, Jeoung-Whan Ryu 5, Young-Soo Seo 4, Yu-Cheol Lee 3, Jung-Joon Moon 1, Dong-Wook Jeon 1, Kyoung-Duck Park 4, Do-Un Jung 1*
1Department of Psychiatry, Busan Paik Hospital, Inje University, Busan, Korea, 2Shim Joo Cheol Psychiatry Clinic, Busan, Korea, 3Department of Psychiatry, Busan Metropolitan Mental Hospital, Busan, Korea, 4Department of psychiatry, Sharing and Happiness Hospital, Busan, Korea, 5Department of Psychiatry, Samsung Changwon Hospital, Sungkyunkwan University, Changwon, Korea
Received: October 22, 2016; Revised: December 15, 2016; Accepted: December 16, 2016; Published online: December 16, 2016.
© The Korean College of Neuropsychopharmacology. All rights reserved.

Abstract
Objective
The study’s aim was to develop and standardize a Korean version of the University of California San Diego Performance-based Skills Assessment (K-UPSA), which is used to evaluate the daily living function of patients with schizophrenia.
Methods
Study participants were 78 patients with schizophrenia and 27 demographically matched healthy controls. We evaluated the clinical states and cognitive functions to verify K-UPSA's reliability and validity. For clinical states, the Positive and Negative Syndrome Scale, Clinical Global Impression-Schizophrenia scale, Social and Occupational Functioning Assessment Scale and Schizophrenia Quality of Life Scale-fourth revision were used. The Schizophrenia Cognition Rating Scale, Short-form of Korean-Wechsler Adult Intelligence Scale, and Wisconsin Card Sorting Test were used to assess cognitive function.
Results
The K-UPSA had statistically significant reliability and validity. The K-UPSA has high internal consistency (Cronbach’s alpha, 0.837) and test–retest reliability (intra-class correlation coefficient, 0.381–0.792; p < 0.001). The K-UPSA had significant discriminant validity (p < 0.001). Significant correlations between the K-UPSA's scores and most of the scales and tests listed above demonstrated K-UPSA's concurrent validity (p < 0.001).
Conclusion
The K-UPSA is useful to evaluate the daily living function in Korean patients with schizophrenia.
Keywords: Cognitive function, Reliability, Schizophrenia, Validity


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