I'd like to see this study done with activity trackers on the children to look at 1) changes in exercise 2) actual sleep time results. Not that I don't believ

I'd like to see this study done with activity trackers on the children to look at 1) changes in exercise 2) actual sleep time results. Not that I don't believe the results, but I we don't need to do self reported studies anymore, and having someone guess how much sleep they got is notoriously unreliable. Without the phones, did the children play outside more (exercise), and of course, did they do an activity like read in bed rather than scrolling - thereby removing the late hour dopamine hit.