Development and Validation of the Occupational Self-Assessment–Short Form (OSA–SF)

Abstract

Importance: The Occupational Self-Assessment, Version 2.2 (OSA 2.2), is a client-centered measure of clients’ perceived occupational competence and value. The OSA 2.2 has previously demonstrated good structural validity and internal consistency; however, the administration length could deter therapists from using this assessment in acute care and acute inpatient rehabilitation. Objective: To evaluate reliability and validity of the OSA 2.2 in acute care and acute inpatient rehabilitation and to develop and validate the OSA–Short Form (OSA–SF). Design: We performed a descriptive psychometric analysis using the Rasch analytic approach. Setting: The data were collected in acute care and acute inpatient rehabilitation. Participants: Our convenience sample consisted of 86 patients in acute care and acute inpatient rehabilitation. Outcomes and Measures: Participants rated their perceived occupational competence and value by completing the OSA 2.2. Results: We examined psychometric properties of the OSA 2.2 and OSA–SF using a partial credit Rasch model. The 21-item OSA 2.2 was reduced to a 12-item OSA–SF through iterative removal of items on the basis of item-misfit statistics. The OSA–SF demonstrated adequate rating scale functioning, dimensionality, item and person goodness of fit, item targeting, item hierarchies, and item and person separation. Conclusions and Relevance: Findings indicate that the OSA–SF is a valid and reliable measure that can guide client-centered goal setting and intervention planning for adults receiving acute care and acute inpatient rehabilitation. What This Article Adds: The OSA 2.2 and the OSA–SF offer a client-centered approach to evaluating patients’ self-reported ability and ratings of the importance of performing everyday occupations. These assessments can guide client-centered goal setting in acute care and acute inpatient rehabilitation.

Psychometric properties of the Bengali-Translated Occupational Self-Assessment Short Form

“…Similarly, the value items demonstrated a comparable ability to categorize items and individuals into three distinct groups with good reliability. These findings are consistent with those observed in the original OSA-SF Scale (Popova et al, 2019). However, the value scale exhibited lower person separation indices and reliability coefficients, suggesting a potential limitation in its ability to differentiate individuals based on their values.…”

“…Through repeated elimination of items based on item-misfit data, the 21-item OSA 2.2 was reduced to a 12-item OSA-SF. The OSA-SF showed appropriate rating scale functionality, dimensionality, item and person goodness-of-fit, item targeting, item hierarchies, and item and person separation (Popova et al, 2019).…”

Defining Occupational Competence and Occupational Identity in the Context of Recovery in Schizophrenia

“…People with other, nonpsychotic conditions may also have a different recovery trajectory, so it would be valuable to include participants with other psychiatric diagnoses in future studies. Last, with the development of the OSA-Short Form (Popova et al, 2019), cross-validation of the current findings against the shortened version would be useful. addressing any cognitive distortions that could widen the gap between competence and identity.…”

Competence in Daily Activities and Mental Well-Being among Technical Intern Trainees in Japan: A Cross-Sectional Study

“…The scores for importance were analyzed only descriptively, as our research purpose was to investigate the relationship between occupational competence and mental well-being. OSA has previously demonstrated good structural validity and internal consistency [ 29 , 30 ]. The Chinese version of the OSA has demonstrated good construct validity and moderate concurrent validity among patients with schizophrenia [ 31 ].…”