THIS IS YOUR BRAIN ON TECH

摘要

According to a recent survey by the Nielsen market-research group, the average American spends nearly four hours a day on computers and mobile devices — and nearly a quarter of that time on social media. While the upsides of all this pixel-gazing are plentiful, the downsides can be scary. In the public arena, online filters generate bubblewt reinforce our preconceptions and amplify our anger. Brandishing tweets like pitchforks, we're swept into virtual mobs; some of us move on to violence IRL. Our digitally enhanced tribalism upends political norms and sways elections.