An experimental comparison of cross-validation techniques for estimating the area under the ROC curve

  • Authors:
  • Antti Airola;Tapio Pahikkala;Willem Waegeman;Bernard De Baets;Tapio Salakoski

  • Affiliations:
  • Department of Information Technology, 20014, University of Turku, Finland and Turku Centre for Computer Science (TUCS), Joukahaisenkatu 3-5 B, 20520 Turku, Finland;Department of Information Technology, 20014, University of Turku, Finland and Turku Centre for Computer Science (TUCS), Joukahaisenkatu 3-5 B, 20520 Turku, Finland;KERMIT, Department of Applied Mathematics, Biometrics and Process Control, Coupure links 653, Ghent University, Belgium;KERMIT, Department of Applied Mathematics, Biometrics and Process Control, Coupure links 653, Ghent University, Belgium;Department of Information Technology, 20014, University of Turku, Finland and Turku Centre for Computer Science (TUCS), Joukahaisenkatu 3-5 B, 20520 Turku, Finland

  • Venue:
  • Computational Statistics & Data Analysis
  • Year:
  • 2011

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Abstract

Reliable estimation of the classification performance of inferred predictive models is difficult when working with small data sets. Cross-validation is in this case a typical strategy for estimating the performance. However, many standard approaches to cross-validation suffer from extensive bias or variance when the area under the ROC curve (AUC) is used as the performance measure. This issue is explored through an extensive simulation study. Leave-pair-out cross-validation is proposed for conditional AUC-estimation, as it is almost unbiased, and its deviation variance is as low as that of the best alternative approaches. When using regularized least-squares based learners, efficient algorithms exist for calculating the leave-pair-out cross-validation estimate.