Abstract
Information integration in risky decision making was studied by using a functional measurement approach..Participants (N=84) played a computerized risky card game inco1porating a within-subject design with the J factors ( a) probability of negative or positive outcome, (b) amount of gain, and ( c) amount of 1055. Results on the group level showed mainly additive patterns of integration. Observed deviations {rom the general .pattern could be e.xplained more detailed by the results of the individual analyses: There was a wide range of tlirrerent strategies from centration to additive and mixed additive-multiplicative strategies. The most frequent rules of integration were additive; pure multiplicative rules were rarely found. These {indings give .support to additive models in risky decision making. However; individual dirrerences in risky decision making strategies appear to be a topic that deserves further study.
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