Studies of extension neglect in other domains have shown that multi-trial
experiments in which extension varies from trial to trial have two effects: they draw
attention to extension as a relevant feature, and they provide a standard that helps
the subject assess values of the extensional attribute as high or low. Extension is
not completely neglected under these conditions. Indeed, significant effects of
extension have been found in within-S experiments in all the domains we have
mentioned. When the base-rate of outcomes is varied from trial to trial, people pay
attention to it Novemsky and Kronzon, 1999.. When the duration of episodes that
are to be evaluated varies from trial to trial, duration neglect is imperfect
Schreiber and Kahneman, 2000; Varey and Kahneman, 1992.. Sample size also
affects judgments in within-subject experiments