Probabilistic Models for Fine-Grained Truth Discovery from Crowdsourced Data

Fenglong Ma, Jing Gao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In crowdsourced data aggregation task, there exist conflicts in the answers provided by large numbers of sources on the same set of questions. The most important challenge for this task is to estimate source reliability and select answers that are provided by high-quality sources. Existing work solves this problem by simultaneously estimating sources' reliability and inferring questions' true answers (i.e., the truths). However, these methods assume that a source has the same reliability degree on all the questions, but ignore the fact that sources' reliability may vary significantly among different topics. To capture various expertise levels on different topics, we propose three fine-grained truth discovery models-parametric probabilistic model (FaitCrowd), non-parametric probabilistic model and topical influence-aware model-for the task of aggregating conflicting data collected from multiple users/sources. These probabilistic models jointly model the process of generating question content and sources' provided answers to estimate both fine-grained expertise and true answers simultaneously. This leads to a more precise estimation of source reliability. Therefore, theses models demonstrate better ability to obtain true answers for the questions compared with existing approaches.

Original languageEnglish (US)
Title of host publicationProceedings - 15th IEEE International Conference on Data Mining Workshop, ICDMW 2015
EditorsXindong Wu, Alexander Tuzhilin, Hui Xiong, Jennifer G. Dy, Charu Aggarwal, Zhi-Hua Zhou, Peng Cui
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1556-1557
Number of pages2
ISBN (Electronic)9781467384926
DOIs
StatePublished - Jan 29 2016
Event15th IEEE International Conference on Data Mining Workshop, ICDMW 2015 - Atlantic City, United States
Duration: Nov 14 2015Nov 17 2015

Publication series

NameProceedings - 15th IEEE International Conference on Data Mining Workshop, ICDMW 2015

Other

Other15th IEEE International Conference on Data Mining Workshop, ICDMW 2015
CountryUnited States
CityAtlantic City
Period11/14/1511/17/15

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications

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