“When people are asked to do something that takes self-control, if they think they are doing it for personal reasons – if they feel like it’s a choice or something they enjoy because it helps someone else – it’s much less taxing. If they feel like they have no autonomy, if they’re just following orders, their willpower muscles get tired much faster. In both cases, people ignored the cookies. But when the students were treated like cogs, rather than people, it took a lot more willpower.”
