Performance of different weighting strategies measured by Pearson method (a) and ROC method (b). Weighting strategies: Unit Weights (UW), Average Pearson (AP), Average ROC (AR), Average Informativeness (AI), Individual Pearson (IP), Individual ROC (IR) and Individual Informativeness (II). In each case, performance is measured for both the weighted product approach and the weighted sum approach. Error bars indicate standard error.