Jagannath Prasad Das (often referred to as JP Das ) (born 20 January 1931) is an Indo-Canadian educational psychologist and an internationally recognized expert in educational psychology, intelligence and childhood development. Among his contributions to psychology are the PASS theory of intelligence and the Das-Naglieri Cognitive Assessment System. Das was the Director of the JP Das Developmental Disabilities Centre at the University of Alberta. He formally retired in 1996, and is currently Emeritus Director of the Centre on Developmental and Learning Disabilities and Emeritus Professor of Educational Psychology at the University of Alberta. He is a member of the Royal Society of Canada, was inducted into the Order of Canada and has an Honorary Doctorate degree from the University of Vigo in Spain. Biography JP Das was born in Puri, a city on the coast of the Bay of Bengal in Odisha, India. He is one of six siblings, and was educated in Cuttack, from grade 2 to the completion of his B.A. degree. He earned a B.A. Honours in Psychology and Philosophy from Ravenshaw college (now university) in Cuttack. He then completed an M.A. in Experimental Psychology at Patna University, India. After two years as a lecturer in Psychology at Utkal University, in 1955 he won a Government of India scholarship to study at the Institute of Psychiatry University of London, supervised by Hans Eysenck. He chose for his dissertation an investigation into the relationship between hypnosis, eyelid conditioning and reactive inhibition. After earning his Ph.D. in 1957, he returned to Utkal University where he was a Lecturer in Psychology, and then a Reader in Psychology, for five years. In 1963, he was awarded a Kennedy Foundation Visiting Professorship at Peabody College of Vanderbilt University in Nashville. After a year there, he moved on to UCLA, where he spent a year as a visiting associate professor in Psychology before returning to Utkal University in 1965. Das moved to the University of Alberta in Edmonton, Alberta, Canada in 1968 as University Research Professor at the Centre for the Study of Mental Retardation that had been established by Donald Ewen Cameron in 1968. He became the third Director of the centre in 1972 and continued to work at the Centre until 1994. He formally retired in 1995, and continues at the Centre as the Emeritus Director and an Emeritus Professor, still conducting research, as well as writing books and articles. The