I read this today and couldn't post on it as the thread was closed:
www.theguardian.com/lifeandstyle/2018/dec/07/mother-on-instagram-baby-fell-down-stairs-parental-phone-use-children
What struck me was how the idea of "looking" as the literal act was at the centre of what was compromised by the attention paid to phones. We speak of "looking after a child" or, in what I think of as the Scottish idiom, "watching". This makes it plain that eye must meet eye, full attention paid. The headline of the child falling downstairs was silly, as this can happen anyway, and not directly phone-related. The later research, based on repeated behaviours, is more interesting.
My own immediate connection was a remark this morning, made by a dog walking acquaintance who noted my new puppy's behaviour: He'll be a good dog, he keeps looking back at you to check." Previous to this I've often noticed walkers who are on headphones/bluetoothing/on phones walking hundred of metres ahead of their dogs, never looking them in the eye. The ones who don't are constantly interacting with their pooches, playing, checking. Oh, and seeing when they take a shit on the other side of the field.
I'm not claiming any superiority here as my child was raised pre-phones.