Researchers at KU Leuven in Belgium asked 233 high school students to recall recent emotional episodes and say how long each one lasted. Out of 27 emotions, sadness came out far ahead: 120 hours on average, versus about half an hour for shame, or 240 times longer. The key factor is rumination. The more you mull over an important event, the longer the feeling drags on.
Remembering is not replaying a recording — it is rebuilding. Each time you recall a memory, it becomes temporarily malleable and can be altered before being stored again. That is why two people can sincerely remember the same event… differently.
In 2003, Johnson and Goldstein compared European countries. Where you must tick a box to become a donor, consent rates ranged from 4% to 28%. Where you're a donor by default unless you opt out, they topped 85%. People aren't more generous on one side; most simply stick with whatever option was chosen for them.