RESUMO
INTRODUCTION: The Activity Diversity Questionnaire consists of 20 items that assess activity diversity using Shannon's entropy. Comparing the relationship between health outcomes and activity diversity is important for older adults. There is no scale in Turkish that can be used to evaluate the activity diversity. The aim of this study is to investigate the relevance of the Activity Diversity Questionnaire for Turkish older adults and the effectiveness of its clinical use. METHODS: 220 older adults were included in the study. In order to determine the reliability of the Activity Diversity Questionnaire, internal consistency and test-retest analyzes were applied. Similar scale validity and confirmatory factor analysis were used to determine its validity. RESULTS: The Turkish version of the Activity Diversity Questionnaire showed high levels of internal consistency and test-retest reliability (Cronbach α = 0.868, ICC = 0.93). Statistically positive, moderate (r = 0.47, p < .001) and strong (r = 0.71, p < .001) correlations were found between the Activity Diversity Questionnaire and the Barthel Activities of Daily Living Index and the Lawton Instrumental Activities of Daily Living Scale, respectively. As a result of Confirmatory Factor Analysis, it was found that the fit index values found acceptable fit compared to the reference values. CONCLUSIONS: The Turkish version of the Activity Diversity Questionnaire has appropriate psychometric properties, including validity and reliability.