I used to be able to sit in a chair and for four hours...

I used to be able to sit in a chair and for four hours straight in a very focused meditative way be in my own world without ay interruption. And now it's like your brain is getting so trained to check your phone, and there is like a dopamine release every time you get a text whether it's a good or a bad one. I'm really worried about what it's doing to our minds.