Development and Validation of Occupation Based Practice Measure (OBPM).

Background. Occupation based practice (OBP) is the central core of occupational therapy. Therefore, measuring its usage and influencing factors seems necessary. Purpose. To develop and validate the occupation based practice measure (OBPM). Method. OBPM was developed in two phases: (I) following a qualitative study, a literature review was conducted. The item pool was revised by expert panel; (II) The face, content, construct validity, internal consistency, and test-retest reliability were assessed. Findings. The 142 items derived through the qualitative study were integrated with the 42 items derived from the literature review. The item pool was reduced by expert panel to 78 items and finalized to 37 items through face, content, and construct validity. Cronbach's alpha was greater than 0.70 and intra-class correlation coefficient showed good to excellent reliability. Implications. OBPM is a valid and reliable questionnaire that evaluates the occupational therapists' knowledge, attitudes, interest, usage, and contextual factors influencing the OBP.