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arXiv 1305.6705cs.GT
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微任务众包中的成本有效激励机制研究

On Cost-Effective Incentive Mechanisms in Microtask Crowdsourcing

Yang Gao, Yan Chen, K. J. Ray Liu

摘要:

虽然微任务众包提供了一种新的方式来解决大量的小任务,与传统的内部解决方案相比,价格要低得多,但由于缺乏激励,它存在质量问题。另一方面,为微任务众包提供激励是具有挑战性的,因为验证提交的解决方案的质量是如此昂贵,这将否定微任务众包的优势。本文研究了微任务众包的成本效益激励机制。特别是,我们考虑一个模型与战略工人,工人的主要目标是最大化自己的效用。基于这个模型,我们分析了两个基本机制,广泛采用现有的微任务众包应用程序,并表明,从工人获得高质量的解决方案,他们的成本受到一些下限。然后,我们提出了一个具有成本效益的机制,采用质量意识的工人培训作为一种工具,以刺激工人提供高质量的解决方案。我们从理论上证明,所提出的机制,适当的设计,可以获得高质量的解决方案,以任意低的成本。除了理论上的保证,我们进一步证明了我们提出的机制,通过一组行为实验的有效性。

英文摘要:

While microtask crowdsourcing provides a new way to solve large volumes of small tasks at a much lower price compared with traditional in-house solutions, it suffers from quality problems due to the lack of incentives. On the other hand, providing incentives for microtask crowdsourcing is challenging since verifying the quality of submitted solutions is so expensive that will negate the advantage of microtask crowdsourcing. We study cost-effective incentive mechanisms for microtask crowdsourcing in this paper. In particular, we consider a model with strategic workers, where the primary objective of a worker is to maximize his own utility. Based on this model, we analyze two basic mechanisms widely adopted in existing microtask crowdsourcing applications and show that, to obtain high quality solutions from workers, their costs are constrained by some lower bounds. We then propose a cost-effective mechanism that employs quality-aware worker training as a tool to stimulate workers to provide high quality solutions. We prove theoretically that the proposed mechanism, when properly designed, can obtain high quality solutions with an arbitrarily low cost. Beyond its theoretical guarantees, we further demonstrate the effectiveness of our proposed mechanisms through a set of behavioral experiments.

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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