GRAININESS OF JUDGMENT UNDER UNCERTAINTY - AN ACCURACY INFORMATIVENESS TRADE-OFF

This work concerns judgmental estimation of quantities under uncertainty. The authors suggest that the ''graininess'' or precision of uncertain judgments involves a trade-off between 2 competing objectives: accuracy and informativeness. Coarse (imprecise) judgments are less informative than finely grained judgments; however, they are likely to be more accurate. This trade-off was examined in 3 studies in which participants ranked judgmental estimates in order of preference. The patterns of preference ranking for judgments support an additive trade-off model of accuracy and informativeness. The authors suggest that this trade-off also characterizes other types of uncertain judgments, such as prediction, categorization, and diagnosis.