ROBERT KRULL is an Associate Professor of Communication at Rensselaer Polytechnic Institute. He received his Ph.D. in Communication Research from the University of Wisconsin—Madison. His research interests include computer documentation and interface design, and appeals and effects of computing and television viewing. He has conducted studies of computer use eye motion, effects of online information design on user performance, and physiological responses of television viewers. His research has been supported by the IBM Corporation, the National Institute of Mental Health, The Children’s Television Workshop, and state and local governments.