Figure 6
Receiver operating characteristic curves for each condition. Hit rates plotted against false alarm rates at each level of the belief scale (0–10). The diagonal line represents an AUC of 0.5, which indicates chance performance (i.e., no discrimination ability). Hit rates are the proportion of true claims with belief scores ≥ the respective level of the belief scale, and false alarm rates are the analogous proportion for false claims. Note that the highest scale values (i.e., belief score of 10) are displayed in the bottom-left portion of the curves (e.g., in the badge/norm condition, approx. 23% of true claims received a score of 10, but only approx. 8% of false claims); moving rightward along the curves, each successive point represents the next lowest belief-scale value. The point at which the curves all meet at the top right corner can thus be interpreted as each curve’s 11th data point (i.e., 100% of claims had belief ratings ≥ 0).
