He directs the Interactive Data and Immersive Environments (INDIE) Lab. His research interests include human-computer interaction, information visualization, visual analytics, virtual reality, and 3D interaction techniques. He previously worked as a visual analytics research scientist at Oak Ridge National Laboratory, where he studied visualization designs that enable monitoring and analysis of streaming data. Current research topics include the visualization of analytic provenance, understandable visual interfaces for machine learning systems, and the natural interaction techniques for immersive virtual environments. Dr. Ragan received his Ph.D. in computer science from Virginia Tech. Contact him at eragan@tamu.edu.