Durability bias
We predict our feelings will last far longer than they actually do.
What it means
Durability bias is the tendency to overestimate how long an emotional reaction to an event will last — the duration component of the impact bias in affective forecasting. Two mechanisms drive it. Immune neglect: we fail to anticipate the psychological immune system of rationalizing, reframing, and explaining away that quietly digests bad outcomes without our noticing. And focalism: we picture the event in isolation and forget the ordinary business of life that will crowd it out. It shows up wherever people forecast their own feelings — a breakup, a redundancy, a promotion, a diagnosis, a big purchase, an election result — and it is strongest for vivid, self-relevant events. The bias is about duration, not direction: people usually get the sign of the feeling right, and events that stay unexplained or keep recurring genuinely do linger. It matters because momentous decisions rest on forecasts of lasting happiness that those forecasts cannot support.
Examples
Assistant professors asked to imagine life after a tenure denial forecast years of misery, yet those actually turned down years earlier proved about as happy as colleagues who had been granted it.
A shopper certain the bigger kitchen will make cooking a joy for years finds that within a couple of months it is simply the kitchen, and the thrill has flattened.
Fans convinced their team's cup final defeat will poison the entire season are back to arguing about next week's fixture by Wednesday, the grief already spent.
First described in Gilbert, Pinel, Wilson and colleagues (1998).