The study of the validity and reliability of the Occupational Self-Assessment-traditional Chinese version

Ay-Woan Pan; LyInn Chung; Tsyr-Jang Chen; Ping-Chuan Hsiung

doi:10.1177/1569186120930300

The study of the validity and reliability of the Occupational Self-Assessment-traditional Chinese version

Hong Kong J Occup Ther. 2020 Jun;33(1):18-24. doi: 10.1177/1569186120930300. Epub 2020 Jun 24.

Authors

Ay-Woan Pan^{1

2}, LyInn Chung³, Tsyr-Jang Chen⁴, Ping-Chuan Hsiung⁵

Affiliations

¹ School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.
² Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan.
³ Department of Statistics, National Taipei University, New Taipei city, Taiwan.
⁴ Department of Mechanical Engineering, Lung Hwa University of Science and Technology, Tao-Yuan, Taiwan.
⁵ Department of Social Worker, National Taiwan University, Taipei, Taiwan.

Abstract

Introduction: Health professionals who work in mental healthcare settings need to use standardised, objective instruments; however, it is also extremely important that they maintain a client-focused perspective. The purpose of this study was to investigate the validity and reliability of the 'Traditional Chinese version of the Occupational Self-Assessment' (TC-OSA).

Methods: A total of 593 participants with mental illnesses participated in the study. The data were analysed using confirmatory factor analysis as well as the Rasch measurement model.

Results: The results of our analysis revealed that the TC-OSA encompasses four domains: self-performance (11 items), self-habituation (5 items), self-volition (5 items) and environment (8 items). Most of the items within each domain were found to have a good fit with the Rasch measurement model, whereas the CFA index was found to have a good fit for only three of the domains, the one exception being the environment domain.

Conclusions: We suggest applying the scale in clinical practice to identify the priority of intervention and as a measure for changes in outcomes. Further development and refinement of the environmental domain is guaranteed.

Keywords: Assessment; Rasch analysis; client centre; confirmatory factor analysis; model of human occupation.