Bauman, A. E., Sallis, J. F., Dzewaltowski, D. A., Owen, N. (2002). Toward a better understanding of the influences on physical activity: The role of determinants, correlates, causal variables, mediators, moderators, and confounders. Am. J. Prev. Med., 23, 5-14. https://doi.org/10.1016/S0140-6736(12)60735-1.
Coronavirus Disease (COVID-19) Pandemic. Front. Public Health, 8, 199. https://doi.org/10.3389/fpubh.2020.00199.
Czaja, R. and Blair, J. (2005). Designing surveys: A guide to decisions and procedures (2nd ed.). London: Sage.
de Vaus, D. (1995). Surveys in social research. St Leonards: Allen & Unwin.
Gall, M. D., Gall, J. P., Borg, W. R. (2007). Educational research: An introduction (8th ed.). Boston: Pearson http://digilib.umpalopo.ac.id:8080/jspui/handle/123456789/260.
Jansen, K. J., Corley, K. G., and Jansen, B. J. (2007). E-survey methodology. In R. A. Reynolds, R. Woods, & J. D. Baker (Eds.), Handbook of research on electronic surveys and measurements (pp. 1-8). Hershey: Idea Group Reference.
Kuss, Daria J. and Mark D. Griffiths. (2012). Adolescent online gaming addiction. Education and Health, 30 (1), 15-17. https://owl.english.purdue.edu/...resource/560/07/.
Mahar, M. T., S. K. Murphy, D. A. Rowe, J. Golden, A. T. Shields, and T. D. Raedeke. (2006). Effects of a classroom-based program on physical activity and on-task behavior. Medicine and Science in Sports and Exercise, 38(12): 2086-2094.
Mcleroy, K. R., Bibeau, D., Steckler, A., Glanz, K. (1988). An Ecological Perspective on Health Promotion Programs. Health Educ. Behav., 15, 351-377. https://doi.org/10.1177%2F109019818801500401.
Piaget, J. (1947). The Psychology of Intelligence. Abingdon: Taylor and Francis.
Piaget, J. (1954). The development of object concept (M. Cook, Trans.). In J. Piaget & M. Cook (Trans.), The construction of reality in the child (pp. 3-96). New York, NY, US: Basic Books. https://doi.org/10.1037/11168-000.
Ricci, F., Izzicupo, P., Moscucci, F., Sciomer, S., Maffei, S., Di Baldassarre, A., Mattioli, A. V., Gallina, S. (2020). Recommendations for Physical Inactivity and Sedentary Behavior During the Coronavirus Disease (COVID-19) Pandemic. https://www.frontiersin.org/articles/10.3389/fpubh.2020.00199/full.
Rock, Dave. (2009, October 4). Easily distracted: why it’s hard to focus, and what to do about it. https://www.psychologytoday.com/.../200910/easily-distracted-why-its-hard-focus-and-what-do-about-it.
Sallis, J. F., Cervero, R. B., Ascher, W., Henderson, K. A., Kraft, M. K., Kerr, J. (2006). An ecological approach to creating active living communities. Annu. Rev. Public Health, 2006, 27, 297-322. https://doi.org/10.1146/annurev.publhealth. 27.021405.102100.
van Landeghem, K. (2003). Preventing obesity in youth through school-based efforts. Washington, DC: National Governors Association Center for Best Practices, Health Policy Studies Division.
Walter, M. (2010). Surveys. In M. Walter (Ed.), Social research methods (2nd ed., pp. 151-183). Melbourne, Victoria: Oxford University Press.