AUTHOR=Hardcastle Sarah J. , Hancox Jennie , Hattar Anne , Maxwell-Smith Chloe , Thøgersen-Ntoumani Cecilie , Hagger Martin S. TITLE=Motivating the unmotivated: how can health behavior be changed in those unwilling to change? JOURNAL=Frontiers in Psychology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2015.00835 DOI=10.3389/fpsyg.2015.00835 ISSN=1664-1078