Abstract: Receiver Operating Characteristics (ROC) graphs are a useful techniquefor organizing classifiers and visualizing their performance. ROC graphs are commonlyused in medical decision making, and in recent years have been increasinglyadopted in the machine learning and data mining research communities. AlthoughROC graphs are apparently simple, there are some common misconceptions and pitfallswhen using them in practice. This article serves both as a tutorial introductionto ROC graphs and as a ...