Development and psychometric properties of a joint protection self-efficacy scale

Niedermann, K; Forster, A; Ciurea, A; Hammond, A; Uebelhart, D; de Bie, R

Abstract

Introduction: self-efficacy is one of the most powerful determinants of behaviour change. To increase effectiveness of joint protection (JP) education, it may be important to address perceptions of JP self-efficacy directly. The aim of this study was to develop a scale to measure JP self-efficacy (JP-SES) in people with rheumatoid arthritis (RA). Methods. Instrument development included item generation, construct validity, and reliability testing. Rasch analysis was applied to determine construct validity and the revised JP-SES was tested again to confirm validity and establish test–retest reliability and internal consistency. Results. A total of 46 items were generated by literature review, occupational therapists, and people with RA. After semi-structured interviews and field-testing with RA participants, a 26-item questionnaire draft was constructed and tested. Rasch analysis to determine construct validity reduced the JP-SES to 13 items with good overall fit values. Rasch analysis of confirmatory validity resulted in a final 10-item version of the JP-SES. Test–retest results supported the validity of the scale, with high internal consistency (a = 0.92) and good test–retest reliability (rs = 0.79; p < 0.001). Conclusions. The JP-SES is a valid and reliable scale to assess perceived ability of people with RA to apply JP methods. The JP-SES could help stimulate the use of efficacy-enhancing methods in JP education.

Citation

Niedermann, K., Forster, A., Ciurea, A., Hammond, A., Uebelhart, D., & de Bie, R. (2011). Development and psychometric properties of a joint protection self-efficacy scale. Scandinavian Journal of Occupational Therapy, 18(2), 143-152. https://doi.org/10.3109/11038128.2010.483690

• Journal Article Type: Article
• Publication Date: Jun 1, 2011
• Deposit Date: Jun 8, 2011
• Journal: Scandinavian Journal of Occupational Therapy
• Print ISSN: 1103-8128
• Publisher: Informa Healthcare
• Peer Reviewed: Peer Reviewed
• Volume: 18
• Issue: 2
• Pages: 143-152
• DOI: https://doi.org/10.3109/11038128.2010.483690
• Keywords: Joint protection, occupational therapy, Rasch analysis, rehabilitation, rheumatoid arthritis, self-efficacy, validation
• Publisher URL: http://dx.doi.org/10.3109/11038128.2010.483690