Danula Hettiachchi

schoolUniversity of Melbournebar_chart#3488 Global Rank

Total Papers

HCI Rank

#3488

Research Areas

Years Active

Recent Publications

The Challenge of Variable Effort Crowdsourcing & How Visible Gold Can Help

We consider a class of variable effort human annotation tasks in which the number of labels required per item can greatly vary (e.g., finding all faces in an image, named entities in a text, bird calls in an audio recording, etc.). In such tasks, some items require far more effort than others to annotate. Furthermore,…

CSCW '201st AuthorCrowds and Collaboration

CrowdCog: A Cognitive Skill based System for Heterogeneous Task Assignment and Recommendation in Crowdsourcing

While crowd workers typically complete a variety of tasks in crowdsourcing platforms, there is no widely accepted method to successfully match workers to different types of tasks. Researchers have considered using worker demographics, behavioural traces, and prior task completion records to optimise task assignment. H…

CHI '201st AuthorVoice User Interface (VUI) Design +1

"Hi! I am the Crowd Tasker" Crowdsourcing through Digital Voice Assistants

Inspired by the increasing prevalence of digital voice assistants, we demonstrate the feasibility of using voice interfaces to deploy and complete crowd tasks. We have developed Crowd Tasker, a novel system that delivers crowd tasks through a digital voice assistant. In a lab study, we validate our proof-of-concept an…

CSCW '193rd AuthorAI and Fairness

Crowdsourcing Perceptions of Fair Predictors for Machine Learning: A Recidivism Case Study

The increased reliance on algorithmic decision-making in socially impactful processes has intensified the calls for algorithms that are unbiased and procedurally fair. Identifying fair predictors is an essential step in the construction of equitable algorithms, but the lack of ground-truth in fair predictor selection…

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