Sara Thomée, doctoral student at the University of Gothenburg’s Sahlgrenska Academy and colleagues conducted four studies to evaluate the effects of heavy computer and cell phone by young adults on sleep quality, stress levels, and general mental health. The studies found that young adults who make particularly heavy use of mobile phones and computers run a greater risk of sleep disturbances, stress, and symptoms of mental health. Heavy use of mobile phones was linked to an increase in sleeping problems in males and an increase in depressive symptoms in both males and females. (University of Gothenburg. "Intensive mobile phone use affects young people's sleep." ScienceDaily. ScienceDaily, 11 June 2012.  Accessed 7-16  <www.sciencedaily.com/releases/2012/06/120611134233.htm>)