https://www.latimes.com/opinion/story/2019-08-22/death-of-reading-high-school-cellphone

In the 1970s, teens read three times as many books as today. In 1980, 60% of high school seniors reported that they read a newspaper, magazine or book on a daily basis for pleasure; by 2016 that number had dropped to 16%. Teenagers are more likely to read books at 13 than 17.

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more on device distraction in this IMS blog
https://blog.stcloudstate.edu/ims?s=distraction

also on electronic devices in the classroom
https://blog.stcloudstate.edu/ims/2017/04/03/use-of-laptops-in-the-classroom/