Adult here that has always had a device with a screen since they first became available. From a black and white Palm which required learning a special cursive s

Adult here that has always had a device with a screen since they first became available. From a black and white Palm which required learning a special cursive script to write quicker, through iPhones of the 3G era to latest Samsungs today. I spend many hours "with screens" every day in addition to a programming job. Before portable devices I always had a computer from age 10 when I got my first 8 bit computer. I was glued to screens ever since. I never had problems with focusing on tasks. In fact when I have a particularly interesting thing I'm doing, unless I actively remind myself to have breaks I'll forget to eat and drink for many hours. So there's my anecdote :-)