The Anxious Generation: How the Great Rewiring of Childhood Is Causing an Epidemic of Mental Illness

by Jonathan Haidt

At this point, after investment, the trigger for the next round of behavior may become internal. The girl no longer needs a push notification to call her over to Instagram. As she is rereading a difficult passage in her textbook, the thought pops up in her mind: “I wonder if anyone has liked the photo I posted 20 minutes ago?” An attractive off-ramp appears in consciousness (step 1). She tries to resist temptation and stick with her homework, but the mere thought of a possible reward triggers the release of a bit of dopamine, which makes her want to go to Instagram immediately. She feels a craving. She goes (step 2) and finds that nobody liked or commented on her post. She feels disappointment, but her dopamine-primed brain still craves a reward, so she starts looking through her other posts, or her direct messages, or anything that shows that she matters to someone else, or anything that provides easy entertainment, which she finds (step 3). She wanders down her feed, leaving comments for her friends along the way. Sure enough, a friend reciprocates by liking her last post. An hour later, she returns to her study of photosynthesis, depleted and less able to focus.