Tom Landauer is a theoretical and applied cognitive scientist, with interests on the one hand in advancing understanding of how complex knowledge, such as language, is learned and used, and on the other hand in creating instructional methods and automated aids to speed and enhance knowledge acquisition and use. He led the brilliant team of young cognitive scientists at Bell Communications Research that invented LSA and, along with Susan Dumais, pioneered LSA's interpretation and validation as a theory of verbal meaning. He is currently a Research Professor at the University of Colorado, Boulde...