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QASCA: A Quality-Aware Task Assignment System for Crowdsourcing Applications

Summary: QASCA is a quality-aware online task assignment system for crowdsourcing on AMT. It models probabilistic ground truths from worker answers to optimize Accuracy and F-score, delivering linear-time assignment and achieving about 8% quality gains across five real applications. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID
ha6f6972d3829b17d
Venue
SIGMOD
Year
2015
Pagerank
6.9657571e-05
Overall Rank
3,849 | 74.21%
DOI
10.1145/2723372.2749430

Incoming Non-self Citations Over Time

Authors

BibTeX Citation

@inproceedings{zheng_sigmod15,
        title = {{QASCA: A Quality-Aware Task Assignment System for Crowdsourcing Applications}},
        author = {Zheng, Yudian and Wang, Jiannan and Li, Guoliang and Cheng, Reynold and Feng, Jianhua},
        series = {{SIGMOD} '15},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/2723372.2749430},
        url = {https://dl.acm.org/doi/10.1145/2723372.2749430},
        year = {2015}
}

Incoming Citations (Sorted by Pagerank)

Showing 18 of 18 citing papers.

Rank Citing Paper Year Venue Pagerank
3,028 Truth Inference in Crowdsourcing: Is the Problem Solved? 2017 VLDB 7.7177453e-05
3,318 Cleaning Crowdsourced Labels Using Oracles for Statistical Classification 2019 VLDB 7.4142395e-05
4,626 Cost-Effective Crowdsourced Entity Resolution: A Partial-Order Approach 2016 SIGMOD 6.480594e-05
5,051 CDB: A Crowd-Powered Database System 2018 VLDB 6.2863221e-05
5,586 Efficient Algorithms for Crowd-Aided Categorization 2020 VLDB 6.0582193e-05
6,404 Human-in-the-loop Data Integration 2017 VLDB 5.7797097e-05
6,791 Crowdsourced Data Management: Overview and Challenges 2017 SIGMOD 5.6647309e-05
7,064 Human-in-the-loop Outlier Detection 2020 SIGMOD 5.5930864e-05
7,074 Cost-Effective Data Annotation using Game-Based Crowdsourcing 2019 VLDB 5.5915502e-05
7,903 Subjective Knowledge Base Construction Powered By Crowdsourcing and Knowledge Base 2018 SIGMOD 5.4135034e-05
9,617 CDB: Optimizing Queries with Crowd-Based Selections and Joins 2017 SIGMOD 5.1376962e-05
10,081 CrowdDQS: Dynamic Question Selection in Crowdsourcing Systems 2017 SIGMOD 5.0732737e-05
10,594 Weighted Set Multi-Cover on Bounded Universe and Applications in Package Recommendation 2026 SIGMOD 4.9605343e-05
10,920 Noisy Interactive Graph Search: An Uncertainty-Based Approach with Online Modeling of Latent Expertise and Difficulty 2026 VLDB 4.9605343e-05
12,158 CONCIERGE: Improving Constrained Search Results by Data Melioration 2020 VLDB 4.9605343e-05
12,261 A Rating-Ranking Method for Crowdsourced Top-k Computation 2018 SIGMOD 4.9605343e-05
12,303 Worker Recommendation for Crowdsourced Q&A Services: A Triple-Factor Aware Approach 2018 VLDB 4.9605343e-05
12,363 DOCS: Domain-Aware Crowdsourcing System 2017 VLDB 4.9605343e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 21 of 21 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank Cited Paper Year Venue Pagerank
92 CrowdDB: Answering Queries with Crowdsourcing 2011 SIGMOD 0.00034613457
199 CrowdER: Crowdsourcing Entity Resolution 2012 VLDB 0.0002551523
257 Crowdsourced Databases: Query Processing with People 2011 CIDR 0.00022914527
266 Human-powered Sorts and Joins 2012 VLDB 0.00022701006
359 Efficient Parallel Set-Similarity Joins Using MapReduce 2010 SIGMOD 0.00019963275
507 A Bayesian Approach to Discovering Truth from Conflicting Sources for Data Integration 2012 VLDB 0.00017144751
754 So Who Won? Dynamic Max Discovery with the Crowd 2012 SIGMOD 0.00014226032
873 Leveraging Transitive Relations for Crowdsourced Joins 2013 SIGMOD 0.00013306946
890 Pay-as-you-go User Feedback for Dataspace Systems 2008 SIGMOD 0.00013212032
932 Question Selection for Crowd Entity Resolution 2013 VLDB 0.00012981731
939 Truth Finding on the Deep Web: Is the Problem Solved? 2013 VLDB 0.00012945534
966 Can We Beat the Prefix Filtering? An Adaptive Framework for Similarity Join and Search 2012 SIGMOD 0.00012777679
991 CrowdScreen: Algorithms for Filtering Data with Humans 2012 SIGMOD 0.00012632003
1,267 CDAS: A Crowdsourcing Data Analytics System 2012 VLDB 0.00011253716
1,283 Fusing Data with Correlations 2014 SIGMOD 0.00011195703
1,721 A Sample-and-Clean Framework for Fast and Accurate Query Processing on Dirty Data 2014 SIGMOD 9.7821782e-05
1,932 Counting with the Crowd 2013 VLDB 9.3441665e-05
2,439 Deco: A System for Declarative Crowdsourcing 2012 VLDB 8.4510942e-05
3,253 Evaluating Entity Resolution Results 2010 VLDB 7.4750552e-05
4,613 Reducing Uncertainty of Schema Matching via Crowdsourcing 2013 VLDB 6.4858366e-05
5,276 An Online Cost Sensitive Decision-Making Method in Crowdsourcing Systems 2013 SIGMOD 6.1866921e-05
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