Martin S. Hagger is Distinguished Professor at the University of California, Merced, Professor (Behaviour Change) in the Faculty of Sport and Health Sciences, University of Jyväskylä, Finland, and Adjunct Professor and Research Consultant in the School of Applied Psychology, Griffith University. His research applies social cognition and motivational theory to predict, understand, and change health behaviours. He has published over 400 articles, chapters, and books, and served as editor of major scholarly peer-reviewed journals.