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- W2975736700 abstract "Wisdom of the crowd revealed striking fact that the majority from crowd is often more accurate than any individual expert. We observed the same story in machine learning--ensemble methods leverage this idea to combine multiple learning algorithms to obtain better classification performance. Among many popular examples is the celebrated Random Forest, which applies the majority voting rule in aggregating different decision trees to make the final prediction. Nonetheless, these aggregation rules would fail when the majority is more likely to be wrong. In this paper, we extend the idea proposed in Bayesian Truth Serum that a surprisingly more popular is more likely the true answer to classification problems. The challenge for us is to define or detect when an should be considered as being surprising. We present two machine learning aided methods which aim to reveal the truth when it is minority instead of majority who has the true answer. Our experiments over real-world datasets show that better classification performance can be obtained compared to always trusting the majority voting. Our proposed methods also outperform popular ensemble algorithms. Our approach can be generically applied as subroutine in ensemble methods to replace majority voting rule." @default.
- W2975736700 created "2019-10-03" @default.
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- W2975736700 date "2019-09-25" @default.
- W2975736700 modified "2023-09-27" @default.
- W2975736700 title "Machine Truth Serum" @default.
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