On the display side, I worked on stereoscopic graphics and video for telerobotic control (the ARGOS project)  ,  ,  ,  . With Bill Buxton and Paul Milgram, I developed a technique, the "Silk Cursor"  that utilizes semi-transparent surfaces for interaction in 3D. I have also studied the anisotropic performance in 3D display .
On the input control side, I analyzed human performance with various types of 6 DOF controls. Follow this link for an overview of my research on the Human Factors in 6 DOF Input, , , , ,  .
I was invloved in studies on task network modelling of human performance  , analysis of vehicle navigation aids , Palm-top VR  , and icons in interface design .