“Lessons happen at every age, but twentysomethings take these difficult moments particularly hard. Remember the 'uneven' twentysomething brain from a couple of chapters ago? The one in which the hot, reactive, emotional part of the brain is fully developed while the cool, rational frontal lobe where we counteract emotion with reason is still wiring up? That's the brain that twentysomethings take to work every day and this is why young workers like Danielle often respond emotionally, rather than rationally, when things at the office go wrong. … With age comes what is known as the ‘positivity effect.’ We become more interested in positive information, and our brains react less strongly to what negative information we do encounter.”