Participants were asked to rak a series of snacks and choose to eat one within a week. if they managed to resist they would be given 5
Poeple asked when leavig the cafteria (satiated) choose more tempting snacks and fail more than those asked when entering (hungry).
We tend to overestimate our level of self-control over our impulsive behaviours.
See the full study here :
Nordgren, L. F., Harreveld, F. van, & Pligt, J. van der. (2009). The Restraint Bias: How the Illusion of Self-Restraint Promotes Impulsive Behavior. Psychological Science, 20(12), 1523–1528. https://doi.org/10.1111/j.1467-9280.2009.02468.x