online survey
possible bias
2 Matching Annotations
- Last 7 days
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www.sciencedirect.com www.sciencedirect.com
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In the U.S., both Facebook and Twitter users spend more time on these services via mobile devices (7 h/day and 2 h/day respectively) than via personal computers (6 h/day and 20 min/day respectively)
does this relate to you? what is your screen time? what are you using your phone for? is it healthy or unhealthy?
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