We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Well, this isn't the first study to make outrageous claims. I'm skeptical. Consider that to even have such a study implies they were hunting for and expecting changes in developing brains and lo and behold they found exactly what they knew they would. I am confident that at some point in the coming months to years that the study will be declared invalid or suspect by different investigators trying to replicate it. Or it could be that my cortex has thinned so much that I just don't understand what is going on.
Search "Brad Huddleston" on YouTube. He's been on top of this for several years. Smartphones and other similar devices are extremely damaging to mental and emotional function, especially in children, but also for adults. He was originally coming from a religious perspective and so was being largely ignored initially, but his views are now spreading and gaining acceptance in the secular world as well.
Compounding this is the fact that the tech world intentionally tries to make these devices and their programs as addictive as possible. Google "digital addiction."
If you want to observe how bad the problem is, just start looking around you and see who is glued looking at their phones. Once you start realizing how great it is you will be shocked. In my estimation it's about 60-80% of people on the street, although that percentage to me seems to be highest where I work in the financial district. I chock that up to folks being pretty much constantly wired into a computer terminal at work too. Once you start noticing, you can't stop noticing. You realize that we are already living in The Matrix.
Of course, this process of observation requires you first turning off your own cell phone or putting it somewhere where it isn't readily accessible. You will see just how much of an outlier you are when you do that.