Don Norman's jnd.org / Logic Versus Usage: The Case for Activity-Centered Design

Column written for Interactions. © CACM, 2006. This is the author’s version of the work. It is posted here by permission of ACM for your personal use. It may be redistributed for non-commercial use only, provided this paragraph is included. In my consulting activities, I often have to explain to companies that they are too logical, too rational. Human behavior seldom follows mathematical logic and