The Cognitive Science of Natural Interaction or Why Suboptimal Performance Results when Human Systems Violate the Design Assumptions of Nature Wayne D. Gray Cognitive Science Department, Rensselaer Polytechnic Institute Talk Presented at HFES Webinar on 2012-Sept-24 W.Gray (Rensselaer Polytechnic Institute) Natural Interaction 2012/09/24 1 / 72