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In observance of the 2024 holiday season, Sage offices will be closed Monday December 23rd through Wednesday January 1st. Normal operations, including shipping for orders placed during the closure, will resume on Thursday January 2nd. For technical support during this time, please visit our technical support page for assistance options. 

We wish you a wonderful holiday season. Thank you. 

Martin S. Hagger University of California - Merced

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.