Sheeran, Paschal, Alexander Maki, Erika Montanaro, Aya Avishai-Yitshak, Angela Bryan, William M. P. Klein, Eleanor Miles, and Alexander J. Rothman. "The Impact of Changing Attitudes, Norms, and Self-Efficacy on Health-Related Intentions and Behavior: A Meta-Analysis." Health psychology : official journal of the Division of Health Psychology, American Psychological Association (2016).