How does smartphone use at night affect duration and quality of sleep, and what impact does that have on mental well-being?

How does smartphone use at night affect duration and quality of sleep, and what impact does that have on mental well-being?

Smartphones and other internet-connected digital media devices such as computer tablets are indispensable tools of modern life. They provide 24-hour access to a seemingly limitless array of information, media, entertainment, and social interactions. There are clear benefits to being hyper-connected in this way, but there are also drawbacks. One significant pitfall concerns the way in which using these devices may affect sleep, especially when used at night.

Review the literature on how digital media device use at night affects sleep and explain how this might affect mental well-being.