crowdsourcing

Fact-Checking at Scale with Crowdsourcing Experiments and Lessons Learned

In this paper, we present our journey in exploring the use of crowdsourcing for fact-checking. We discuss our early experiments aimed towards the identification of the best possible setting for misinformation assessment using crowdsourcing. Our …

How Many Crowd Workers Do I Need? On Statistical Power When Crowdsourcing Relevance Judgments

To scale the size of Information Retrieval collections, crowdsourcing has become a common way to collect relevance judgments at scale. Crowdsourcing experiments usually employ 100-10,000 workers, but such a number is often decided in a heuristic way. …

The Effects of Crowd Worker Biases in Fact-Checking Tasks

Due to the increasing amount of information shared online every day, the need for sound and reliable ways of distinguishing between trustworthy and non-trustworthy information is as present as ever. One technique for performing fact-checking at scale …

Longitudinal Loyalty: Understanding the Barriers to Running Longitudinal Studies on Crowdsourcing Platforms

Internal Talk - Centrum Wiskunde & Informatica. June 14th, Amsterdam, The Netherlands.

Social Computing - 2021/2022

Bachelor's Degree in Internet of Things, Big Data & Web at the University of Udine. Academic Year 2021/2022. Lectures: 6. Hours: 12

Social Computing - 2022/2023

Bachelor's Degree in Internet of Things, Big Data & Web at the University of Udine. Academic Year 2022/2023. Lectures: 2. Hours: 4

Social Computing - 2022/2023

Bachelor's Degree in Internet of Things, Big Data & Web at the University of Udine. Academic Year 2022/2023. Lectures: 2. Hours: 4

Crowd_Frame: A Simple and Complete Framework to Deploy Complex Crowdsourcing Tasks Off-the-Shelf

Conference Talk - The 15th ACM International Conference on Web Search and Data Mining. February 15th, 2022. Phoenix, U.S.A. Held remotely as a pre-recorded contribution due to the COVID-19 pandemic.

Crowd_Frame: A Simple and Complete Framework to Deploy Complex Crowdsourcing Tasks Off-the-Shelf

Due to their relatively low cost and ability to scale, crowdsourcing based approaches are widely used to collect a large amount of human annotated data. To this aim, multiple crowdsourcing platforms exist, where requesters can upload tasks and …

The Many Dimensions of Truthfulness: Crowdsourcing Misinformation Assessments on a Multidimensional Scale

Recent work has demonstrated the viability of using crowdsourcing as a tool for evaluating the truthfulness of public statements. Under certain conditions such as: (1) having a balanced set of workers with different backgrounds and cognitive …