Distinguished Research Professor, University of Calgary

Emeritus Distinguished Board of Trustees and Alumni Professor

Amsterdam University Medical Centers and Vrije Universiteit Amsterdam

Professor, Quantitative Methods, Vanderbilt University

Professor of Psychology, University of Washington

University of Virginia; Center for Open Science

Professor of Epidemiology, Tehran University of Medical Sciences

Emeritus Professor of Education and Social Research, The Open University

National and Kapodistrian University of Athens, Medical School

Professor of Psychological Methods, University of Amsterdam