Extension neglect has also been observed in a paradigm in which participants are exposed for some time to an unpleasant experience. The participants provide a continuous report of current discomfort, using an ‘affect meter.’ Later they provide a global judgment of the entire episode. Various experiences have been studied, including unpleasant films (e.g., of an amputation), immersion of the hand in cold water, exposure to loud noise, and painful medical procedures (see Kahneman, Wakker and Sarin (1997) for a review). For our purposes, an episode of discomfort can be construed as a set of unpleasant moments. The duration of the episode is the measure of extension. Valuation by prototype implies that participants will construct or remember a typical moment of the episode, and evaluate the episode as a whole by the level of unpleasantness associated with the prototypical moment} the duration of the episode will be neglected. The hypothesis of duration neglect has been confirmed in several experiments, with both ratings and choices as dependent variables (Kahneman, Wakker and Sarin, 1997).