Williams, G. C., Patrick, H., Niemiec, C. P., Ryan, R. M., Deci, E. L., & McGregor, H. A. (2011). The smoker’s health project: A self-determination theory intervention to facilitate maintenance of tobacco abstinence. Contemporary Clinical Trials, 32, 535-543. doi: 10.1016/j.cct.2011.03.002
Williams, G. C., McGregor, H. A., Sharp, D., Levesque, C. S., Kouides, R. W., Ryan, R. M., & Deci, E. L. (2006). Testing a self-determination theory intervention for motivating tobacco cessation: Supporting autonomy and competence in a clinical trial. Health Psychology, 25(1), 91-101. doi: 10.1037/0278-6220.127.116.11
Williams, G. C., McGregor, H. A., Sharp, D., Kouides, R. W., Levesque, C. S., Ryan, R. M., & Deci, E. L. (2006). A self-determination multiple risk intervention trial to improve smokers’ health. Journal of General Internal Medicine, 21, 1288-1294.
Williams, G. C., McGregor, H. A., King, D., Nelson, C. C., & Glasgow, R. E. (2005). Variation in perceived competence, glycemic control, and patient satisfaction: Relationship to autonomy support from physicians. Patient Education and Counseling, 57, 39-45.
Williams, G. C., McGregor, H. A., Zeldman, A., Freedman, Z. R., Deci, E. L., & Elder, D. (2004). Testing a self-determination theory process model for promoting glycemic control through diabetes self-management. Health Psychology, 23, 58-66.