arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.08591cs.HCcs.LGstat.ML
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双重强大的众包

Doubly Robust Crowdsourcing

University of California, Santa Barbara(加州大学圣巴巴拉分校)

Chong Liu, Yu-Xiang Wang

摘要:

正如我们今天所看到的,大规模标记数据集是点燃人工智能革命不可或缺的燃料。大多数这样的数据集都是使用众包服务构建的,例如Amazon Mechanical Turk,它以公平的价格提供来自非专家的噪声标签。这些数据集的庞大规模要求每个数据点只能收集几个标签。我们将测试时间标签聚合问题表示为推断预期投票得分的统计估计问题。通过模仿工人与监督学习者,并使用它们在一个双重强大的估计框架,我们证明了估计的方差可以大大减少,即使学习者是一个穷人的近似。合成和真实世界的实验表明,通过将双重鲁棒方法与自适应工人/项目选择规则相结合,我们通常需要更低的标签成本来实现与理想世界中几乎相同的准确性,在理想世界中,所有工人都标记所有数据点。

英文摘要:

Large-scale labeled dataset is the indispensable fuel that ignites the AI revolution as we see today. Most such datasets are constructed using crowdsourcing services such as Amazon Mechanical Turk which provides noisy labels from non-experts at a fair price. The sheer size of such datasets mandates that it is only feasible to collect a few labels per data point. We formulate the problem of test-time label aggregation as a statistical estimation problem of inferring the expected voting score. By imitating workers with supervised learners and using them in a doubly robust estimation framework, we prove that the variance of estimation can be substantially reduced, even if the learner is a poor approximation. Synthetic and real-world experiments show that by combining the doubly robust approach with adaptive worker/item selection rules, we often need much lower label cost to achieve nearly the same accuracy as in the ideal world where all workers label all data points.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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