- Multiple papers have won best paper awards, such as 'WeAudit: Scaffolding User Auditors and AI Practitioners in Auditing Generative AI' (CSCW 2025) and 'Understanding Frontline Workers’ and Unhoused Individuals’ Perspectives on AI Used in Homeless Services' (CHI 2023).
- Research work has been widely covered by CNN, New York Times, BBC, and more.
- Supervised 21 postdocs and PhD students, and taught hundreds of undergrads and master's students.
- Research team has been funded by DARPA, National Science Foundation, Army Research Office, and more.
Research Experience
- Pioneered research on protecting people from phishing scams.
- Deployed Livehoods, which was the first paper to use geotagged social media to understand the dynamics of cities.
- Investigated Social Cybersecurity, which looked at how to adopt ideas from social psychology to positively influence people’s privacy and security behaviors.
- Pioneered new system architectures and developer tools for smartphone privacy.
- Deployed PrivacyGrade.org, a web site where they analyzed the privacy of over a million Android apps based on a model of people’s expectations of privacy.
- Wrote The Design of Sites, one of the earliest books on user interface design patterns, sold about 100k copies worldwide.
- Developed WeAudit, a suite of tools for helping everyday people collectively audit AI systems for bias and fairness.
- Co-founded the Master’s of Product Management (MSPM), a joint program between HCII and Tepper School of Business.
Background
His primary field is human-computer interaction. His areas of work are in usable privacy and security, mobile computing, Internet of Things, and AI fairness and bias. He is currently focusing on Responsible AI and working on a new startup at the intersection of AI + HCI.