https://www.cbsnews.com/news/phones-tablets-and-their-impact-on-kids-brains-60-minutes/
EXCERPT:
Programmers call it “brain hacking,” and Anderson Cooper reported on it in the 2017 piece embedded below. He found that brain hacking depends heavily on building unexpected rewards into apps. As users stumble onto these hidden treasures, the surprise stimulates production of a brain chemical called dopamine. Neurologists told us dopamine signals the body that something pleasurable is about to occur. It plays a pivotal part in cravings and desire.
