Document Type : Research Paper
Authors
1
PhD Student of Exercise Physiology, Faculty of Humanities, Science and Research Branch, Islamic Azad University, Tehran, Iran
2
Assistant Professor of Motor Behavior, Faculty of Humanities, Sari Branch, Islamic Azad University, Sari, Iran
3
Associate Professor of Motor Behavior and Sport Psychology, Faculty of Physical Education and Sport Sciences, Arak University, Arak, Iran
10.22080/jsmb.2021.19271.3385
Abstract
Background and purpose: The purpose of this study was to assess the validity and reliability of the Persian version of the physical activity questionnaire for adolescents between 14-19 years. Methodology: The statistical population included the 9-12 grade public schools students in the cities of Mazandaran province in the year 2018, 724 (mean age: 16.28 ± 1.42) of which were selected through the random cluster sampling method from junior high and high schools with probability of sample loss. The data collection tools included the physical activity questionnaire for adolescents and the Xiaomi Mi Band Pedometer. Standard translation and back translation methods were used to assess face validity and translation accuracy of the Persian version of the questionnaire. A total of 56 subjects were excluded from the study based on the exclusion criteria and 668 subjects remained. Content, construct, and convergent validity were analyzed through the content validity index, exploratory and confirmatory factor analysis, and with a pedometer (n=250). Reliability was investigated by intra-class correlation coefficient, Cronbach's alpha coefficient, and corrected item total correlations. Results: Face validity and translation accuracy of the Persian version of the questionnaire were confirmed and the content validity index was (r= 0.90). Exploratory factor analysis showed a single-factor structure and confirmatory factor analysis supported the single-factor structure, revealing the favorable fitness indicators (RMSEA= 0.08, GFI= 0.94, AGFI= 0.91, NFI= 0.93, NNFI= 0.92 and CFI= 0.95). The correlation between the physical activity questionnaire for adolescents scores with the pedometer-based physical activity was (r= 0.51). Intra-class correlation coefficient was (r= 0.90) and Cronbach’s alpha coefficient was (r= 0.87). Finally, all corrected item total correlation coefficients were > 0.30. Conclusion: This study showed that the Persian version of the Physical Activity Questionnaire for adolescents (PAQ-A) can be used as a valid and reliable instrument for measuring the physical activity of adolescents.
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