Optometry’s Prentice Medal (1987), Pennsylvania Optometric Association's Van Essen Award (1987), and honorary Doctor of Science from the State University of New York (1991). He launched distant collaborations with the support of fellowships from the Guggenheim Fellowship (1957-58) for research at the University of Munich, Senior von Humboldt Fellowship (1976–78). In 1983, he was a Fellow at the Center for Advanced Study in the Behavioral Sciences at Stanford University. He also served on the advisory board of the Pennsylvania Transportation Institute, Penn State Applied Research Laboratory, Center for Higher Education, National Society to Prevent Blindness, and Life-Sight Advisory Committee. In addition, he was active on the National Research Council Vision Committee, chairing numerous initiatives. Leibowitz was a Fellow of the American Psychological Association, American Association for the Advancement of Science, American Academy of Optometry, Human Factors Society, and Optical Society of America, and a member of the International Perimetric Society, Eastern Psychological Association, American Medical Athletic Association, Association for Research in Vision and Ophthalmology, Society for Scientific Exploration, International Society for Ecological Psychology, American Psychological Society, and Sigma Xi. References External links 1925 births 2011 deaths Neuropsychologists American neuroscientists 20th-century American psychologists Psychophysics Visual perception People from York, Pennsylvania University of Pennsylvania alumni University of Paris alumni University of Wisconsin–Madison faculty Pennsylvania State University faculty United States Army soldiers United States Army personnel of World War II Teachers College, Columbia University alumni