Subjects were exposed to two aversive experiences: in the short trial,
they immersed one hand in water at 14-degrees-C for 60 s; in the long
trial, they immersed the other hand at 14-degrees-C for 60 s, then ke
pt the hand in the water 30 s longer as the temperature of the water w
as gradually raised to 15-degrees-C, still painful but distinctly less
so for most subjects. Subjects were later given a choice of which tri
al to repeat. A significant majority chose to repeat the long trial, a
pparently preferring more pain over less. The results add to other evi
dence suggesting that duration plays a small role in retrospective eva
luations of aversive experiences; such evaluations are often dominated
by the discomfort at the worst and at the final moments of episodes.