Schroedinger's Threshold: When the AUC doesn't predict Accuracy

arXiv:2404.03344v1 Announce Type: new
Abstract: The Area Under Curve measure (AUC) seems apt to evaluate and compare diverse models, possibly without calibration. An important example of AUC application is the evaluation and benchmarking of models that predict faithfulness of generated text. But we show that the AUC yields an academic and optimistic notion of accuracy that can misalign with the actual accuracy observed in application, yielding significant changes in benchmark rankings. To paint a more realistic picture of downstream model …

abstract academic accuracy application arxiv auc benchmarking cs.cl diverse evaluation example generated show text threshold type