Development of the Self-efficacy for Social Participation scale (SOSA) for community-dwelling older adults.

Background: Social participation is important for the health of older adults and super-aging societies. However, relatively few independent older adults in advanced countries actually participate in society, even though many of them have the capacity to do so. One possible reason for this could be a lack of self-efficacy for social participation. However, few scales have been developed to measure self-efficacy for social participation among community-dwelling independent older adults. Therefore, we developed the "Self-efficacy for Social Participation" scale (SOSA) to assess the self-efficacy of community-dwelling independent older adults, and examined the scale's reliability and validity.

Methods: We distributed a self-administered mail survey to approximately 5,000 randomly selected independent older adults throughout Japan. The construct validity of the SOSA was determined using exploratory and confirmatory factor analyses. Criterion-related validity was assessed using the General Self-Efficacy Scale (GSES) and according to subjective health status.

Results: In total, 1,336 older adults responded to the survey. Exploratory and confirmatory factor analyses identified 12 items distributed among four factors: instrumental self-efficacy, managerial self-efficacy, interpersonal self-efficacy and cultural self-efficacy. The final model had a Cronbach's alpha of 0.90, goodness-of-fit index of 0.948, adjusted goodness-of-fit index of 0.915, comparative fit index of 0.952, and root mean square error of approximation of 0.078. Significant correlations existed between the SOSA score and GSES (r = 0.550, p < 0.01) and subjective health status (r = 0.384, p < 0.01) scores.

Conclusions: The SOSA showed sufficient reliability and validity to assess self-efficacy for social participation among older adults. This scale could aid efforts to improve the physical and mental health, and longevity, of older adults through increased behavioralizing social participation.