Would you know if your device was listening to your conversations? How do you feel when an app tracks your location? We are studying people's security choices and when and why they trust technology.

Interpersonal relationships are the most important part of life and the best predictor of long-term wellbeing. Technology has the potential to support relationships but too often undermines them instead. We design systems that support, rather than erode, these connections.

When are design decisions in service of the end user and when do they manipulate the user in service of profit motives? We catalogue dark patterns, invent ways to detect them, and present "bright patterns" as a foil designers can adopt instead.

Have you ever found yourself embroiled in an argument on social media? We are studying the ways in which the design of a platform changes the tenor of a conversation and what leads to friendship, fights, and reconciliation.

What kinds of technology support children's development? What kinds of designs are best for the littlest users? We study the design of technologies for preschoolers and consider interface choices as they relate to development.

Many people report compulsively checking in with their phones and wanting to change their behaviors. We examine why it matters to them, what they can to do to make changes, and how designers can be supportive.