P,S Screens and the Stress Response this is totaly flawed look at this studies limitation. Exposure to EMFs (electromagnetic fields) from cell tower is associated with perceptual speed increase and accuracy decrease (consistent with fight or flight response), and sleep problems are you serious? first other studies dont find corelation, second even if Antenas are outside.
Retina study limitation is that the study design is cross-sectional and does not provide temporal information on the associations also we cannot exclude the possibility of residual confounding, although we have attempted to adjust for several confounders; it is outside the scope of this analysis to adjust for social and dietary factors

Attention impaired via stress hormones norepinephrine and cortisol following psychological stress (video game used as stressor

http://psychcentral.com/news/2007/10/24/video-game-lowers-stress-hormone/1446.html
http://www.tamiu.edu/newsinfo/7-08-10/article5.shtml
http://www.ecu.edu/cs-hhp/rcls/biofeedback/upload/The-Effectiveness-of-Casual-Video-Games-in-Improving-Mood-and-Decreasing-Stress.pdf

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