Will you have that extra chocolate bar when you're worried about your weight? Will you spend that extra hour on the internet when you have other things to do? Will you have that extra drink with an attractive colleague when your partner is waiting at home? Our lives are full of temptations and some of us are better at resisting them than others. But unexpectedly, the very people who think they are most restrained are also most likely to be impulsive. Their inflated belief in their own self-control leads them to overexpose themselves to temptation.
In a series of four experiments, Loran Nordgren from Northwestern University showed that people suffer from a "restraint bias", where they overestimate their ability to control their own impulses. Those who fall prey to this fallacy most strongly are more likely to dive into tempting situations. Smokers, for example, who are trying to quit, are more likely to put themselves in situations if they think they're invulnerable to temptation. As a result, they're more likely to relapse.
