Ujwal Gadiraju

schoolLeibniz University Hannoverbar_chart#2935 Global Rank

Total Papers

HCI Rank

#2935

Research Areas

Years Active

Recent Publications

Improving Worker Engagement Through Conversational Microtask Crowdsourcing

The rise in popularity of conversational agents has enabled humans to interact with machines more naturally. Recent work has shown that crowd workers in microtask marketplaces can complete a variety of human intelligence tasks (HITs) using conversational interfaces with similar output quality compared to the tradition…

CHI '19CorrespondingCrowdsourcing Task Design & Quality Control +1

Understanding and Mitigating Worker Biases in the Crowdsourced Collection of Subjective Judgments

Crowdsourced data acquired from tasks that comprise a subjective component (e.g. opinion detection, sentiment analysis) is potentially affected by the inherent bias of crowd workers who contribute to the tasks. This can lead to biased and noisy ground-truth data, propagating the undesirable bias and noise when used in…

CSCW '193rd AuthorHuman–machine configurations

Dissonance Between Human and Machine Understanding

Complex machine learning models are deployed in several critical domains including healthcare and autonomous vehicles nowadays, albeit as functional blackboxes. Consequently, there has been a recent surge in interpreting decisions of such complex models in order to explain their actions to humans. Models which corresp…

CHI '181st AuthorCrowdsourcing Task Design & Quality Control

Using Worker Self-Assessments for Competence-based Pre-Selection in Crowdsourcing Microtasks

Paid crowdsourcing platforms have evolved into remarkable marketplaces where requesters can tap into human intelligence to serve a multitude of purposes, and the workforce can benefit through monetary returns for investing their efforts. In this work, we focus on individual crowd worker competencies. By drawing from s…

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