Sleep:

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Xanidis, N., & Brignell, C. M. (2016). The association between the use of social network sites, sleep quality and cognitive function during the day. Computers in Human Behavior, 55, 121-126. doi:10.1016/j.chb.2015.09.004

 

Orzech, K. M., Grandner, M. A., Roane, B. M., & Carskadon, M. A. (2016). Digital media use in the 2 h before bedtime is associated with sleep variables in university students. Computers in Human Behavior, 55, 43. doi:10.1016/j.chb.2015.08.049

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Physical Health:

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Eysenbach, G., Steele, R., McConnon, A., Vandelanotte, C., Sugiyama, T., Gardiner, P., & Owen,     N. (2009). Associations of leisure-time internet and computer use with overweight and obesity, physical activity and sedentary behaviors: Cross-sectional study. Journal of Medical Internet Research, 11(3), 1-8. doi: 10.2196/jmir.1084 

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Zach, S., & Lissitsa, S. (2016). Internet use and leisure time physical activity of adults – A nationwide survey. Computers in Human Behavior, 60, 483-491. doi:                 10.1016/j.chb.2016.02.077

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Mental Health:

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Barry, C. T., Sidoti, C. L., Briggs, S. M., Reiter, S. R., & Lindsey, R. A. (2017). Adolescent social media use and mental health from adolescent and parent perspectives. Journal of Adolescence, 61, 1-11.

 

Festinger, L. (1954). A theory of social comparison processes. Human Relations, 7(2), 117-140. 

 

Hogue, J. V., & Mills, J. S. (2019). The effects of active social media engagement with peers on body image in young women. Body Image, 28, 1-5.