Frank Ritter is a Professor of IST, Psychology, and Computer Science and Engineering at Penn State. He researches the development, application, and methodology of cognitive models, particularly as applied to interface design, predicting the effect of behavioral moderators, and understanding learning, and conducts experiments to test these models. With Martin Yeh, he has a popular iPhone app, CaffeineZone, for predicting the time course and effects of caffeine. His lab is building and testing tutors on several topics. His report on applying cognitive models in synthetic environments, was publis...