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Poster
Max-Margin Majority Voting for Learning from Crowds
TIAN TIAN · Jun Zhu

Thu Dec 10 08:00 AM -- 12:00 PM (PST) @ 210 C #32 #None
in Poster Session »

Learning-from-crowds aims to design proper aggregation strategies to infer the unknown true labels from the noisy labels provided by ordinary web workers. This paper presents max-margin majority voting (M^3V) to improve the discriminative ability of majority voting and further presents a Bayesian generalization to incorporate the flexibility of generative methods on modeling noisy observations with worker confusion matrices. We formulate the joint learning as a regularized Bayesian inference problem, where the posterior regularization is derived by maximizing the margin between the aggregated score of a potential true label and that of any alternative label. Our Bayesian model naturally covers the Dawid-Skene estimator and M^3V. Empirical results demonstrate that our methods are competitive, often achieving better results than state-of-the-art estimators.

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Author Information

TIAN TIAN (Tsinghua University)
Jun Zhu (Tsinghua University)

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