Boosting the Area Under the ROC Curve (Poster M32) Phil Long (Google) and Rocco Servedio (Columbia) • Ranking problem ●

 Goal: highest scorers mostly members

•  AUC (Area Under the ROC Curve) ●

 Standard criterion



 Value ½ for random output



 Value 1 for perfect output

True positives



 Given examples of members and nonmembers of a class,  output scoring function

•  Theorem

False positives



 Can “boost” the AUC (slightly better than ½ implies close to 1)



 … also with misclassification noise at rate η < ½.



 Contrasts w/ classification, where 1 – η best possible [KS05]

Boosting the Area Under the ROC Curve (Poster ... - Research at Google

Boosting the Area Under the ROC Curve (Poster M32). Phil Long (Google) and Rocco Servedio (Columbia). • Ranking problem. ○ Given examples of members ...

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