Iowa State University, Distinguished Professor

Professor Emeritus, Department of Psychology, University of Konstanz (Germany)

University of Pennsylvania

Saxon Emeritus Professor of Psychology, The University of Alabama

University of Central Lancashire

Professor of Neuroscience, Icahn School of Medicine at Mount Sinai

Professor for Neurobiology / Animal Physiology, University of Regensburg, Germany

Distinguished Professor, Iowa State University

Professor of Psychology, University of Texas at Austin

Professor of Psychology, University of Toronto