Karrie Karahalios is an associate professor in computer science at the University of Illinois where she heads the Social Spaces Group. Her work focuses on the interaction between people and the social cues they emit and perceive in face-to-face and mediated electronic spaces. Her work is informed by communication studies and visualizations of social communities. Of particular interest are interfaces for pubic online and physical gathering spaces such as twitter, chatrooms, cafes, parks, etc. Research projects range from studying tie strength between people to encouraging vocalization through visualization. A major theme in the work is to create interfaces that enable users to perceive conversational patterns that are present, but not obvious, in traditional communication interfaces.