Abstract
This experiment was designed to isolate the incentive properties of uncertainty reduction (information) from those of material reward value and variety in a binary, competitive reward situation. After pretraining, fourth-grade children chose between a prescaled high-reward object and a question mark stimulus which concealed one of two lower-valued objects on each of 40 trials. The concealed objects appeared equally often for half the Ss and with a 9:1 ratio for the rest, thus, reducing one or 47 bit of uncertainty, respectively, when chosen. Ss also served as their own controls. In the control condition, stimulus color cued the identity of the concealed object, reducing uncertainty before a choice was made. As predicted, significantly more question marks were chosen when such choice reduced uncertainty ( p < .001). Evidence for the influence of relative-reward value and object novelty was obtained. Uncertainty reduction appears to have incentive value independent of other factors.
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