• Ph.D., Louisiana State University, Baton Rouge, LA, 2002, Clinical Psychology
  • M.A., Clinical Psychology, Louisiana State University, Baton Rouge, LA, 1999, Clinical Psychology
  • B.S., Psychology, Florida State University, Tallahassee, FL, 1996, Psychology

Laboratory Website

Research Interests

With the dawn of new e-health technologies and population health research models to reach populations who don’t have access to or who are unable to participate in clinical programs and/or healthcare, Dr. Stewart has been a pioneer in the development and testing e-health technologies and community-based programs in order to disseminate prevention and treatment efforts to large populations for eating disorders, obesity, and body image disturbance.

Dr. Stewart is the Dudley & Beverly Coates Endowed Associate Professor, and the Director of the Behavior Technology Laboratory: Health, Performance & Resilience, at Pennington Biomedical Research Center, and serves as the Director of the Pennington Diabetes Clinic. Dr. Stewart’s work is dedicated to Translational Science: taking e-health assessment, prevention, and treatment technologies from bench to bedside. Dr. Stewart has spearheaded unique, large, multi-site studies that have included the development and deployment of novel technologies for behavior change. This work includes the examination of the efficacy of programs designed to enhance health (nutrition, fitness, sleep), performance, and resilience in U.S. Army Soldiers and military families, funded by the Department of Defense, and a NIH funded trial investigating a healthy weight program targeting the prevention of eating disorder risk factors, obesity, and the Female Athlete Triad (osteoporosis, cessation of menses) in female collegiate athletes.

Dr. Stewart currently fosters many collaborations, including a collaboration with Mayor Broome’s Health BR, disseminating a program aimed at improving nutrition, fitness, sleep, and body image in kids, across community settings. Dr. Stewart’s multidisciplinary laboratory consists of psychologists, behavioral research associates, registered dietitians, exercise physiologists, computer programmers, developers, statisticians, project managers, and Soldiers in the U.S. Army. Dr. Stewart and her team have combined expertise in the areas of novel behavioral assessment, treatments, and intervention technology development and delivery, and extensive experience in the design, implementation/ management, and dissemination of large, multi- site trials. Over the last 20 years, Dr. Stewart has collaborated on landmark obesity studies including DPP and Look AHEAD. Dr. Stewart has recently taken on the role of executing Pennington’s first model treatment clinic, targeting obesity and type 2 diabetes in the Medicaid population in Louisiana, deploying the highest level obesity science in a pragmatic community treatment model.

Selected Publications

  1. Stewart, T.M., Williamson, D.A., Smeets, M.A.M. & Greenway, F.L. (2000). A Computerized Assessment of Body Image: A Psychometric Study. Obesity Research, 9(1), 43-50. PMCID: PMC2743122
  2. Stewart, T.M., Williamson, D.A., & White, M. (2002). Rigid and Flexible Dieting: Association with BMI and Eating Disorder Symptoms. Appetite 38, 39-44.
  3. Stewart, T.M. & Williamson, D.A. (2004). Multidisciplinary Treatment of Eating Disorders I: Structure and Costs of Treatment. Behavior Modification, 28(6), 812-830.
  4. Stewart, T.M. & Williamson, D.A. (2004). Multidisciplinary Treatment of Eating Disorders II: Primary Goals and Content of Treatment, A Mindful Approach. Behavior Modification, 28(6), 831-853.
  5. Stewart, T.M. (2004). Light on Body Image Treatment: Acceptance through Mindfulness. Behavior Modification, 28(6), 783-811.
  6. Stewart, T. M.(2007). Genes and binge eating: Are we missing the target? Obesity Management, 2(6), 223-226.
  7. Williamson, D.A., Copeland, A.L., Anton, S.D., Champagne, C., Han, H., Lewis, L., Martin, C., Newton, R.L., Sothern, M., Stewart, T., & Ryan, D. (2007). Wise Mind Project: A School-Based Environmental Approach for Preventing Weight Gain in Children. Obesity, 15(4), 906-917.
  8. Stewart, T.M., May, S., Allen, H.R., Bathalon, G.P., LaVergne, G., Sigrist, L., Ryan, D.H., & Williamson, D.A. (2008). Development of an Internet/Population-based weight management program for the U.S. Army. Journal of Diabetes Science and Technology 2(1), 116-126. PMCID: PMC2769719
  9. Stewart, T. M., Allen, H. R., Han, H. & Williamson, D. A. The Development of the Body Morph Assessment Version 2.0 (BMA 2.0): Tests of Reliability and Validity. (2009). Body Image 6(2), 67-94. PMCID: PMC2743122
  10. Stewart, T.M., Bachand, A., Han, H., Ryan, D., Bray, G.A., & Williamson, D.A. (2010). Body image changes associated with participation in an intensive lifestyle weight loss intervention. Obesity. NIHMSID: NIHMS250514
  11. Stewart, T.M., Han, H., Ryan, D.H., Newton, R.L. Jr., & Williamson, D.A. (2011). H.E.A.L.T.H.: Efficacy of an Internet/Population-based Behavioral Weight Management Program for the U.S. Army. Journal of Diabetes Science and Technology 5, 178-187. PMCID: PMC3045224
  12. Stewart, T.M., Bhapkar, M., Das, S., Galan, K., Martin, C.K., McAdams, L., Pieper, C., Redman, L., Roberts, S., Stein, R.I., Rochon, J., & Williamson, D.A., for the CALERIE Study Group (2013). Comprehensive assessment of Long-Term effects of reducing intake of energy Phase 2 (CALERIE Phase 2): Screening and Recruitment: Methods and Results. Contemporary Clinical Trials, 34 (1), 10-20. PMCID: PMC3525758
  13. Becker, C., Hill, K., Greif, R., Han, H., & Stewart, T.M. (2013). Reducing Self-Objectification: Are dissonance-based methods a possible approach? Journal of Eating Disorders, 1:10,1-10. DOI: 10.1186/2050-2974-1-10.
  14. Becker, C.B., Plasencia, M., Kilpela, L.S., Briggs, M., & Stewart, T.M. (2014). Changing the course of comorbid eating disorders and depression: What is the role of public health interventions in targeting shared risk factors? Journal of Eating Disorders, 2 (15), 1-14.
  15. Stewart, T.M., Plasencia, M., Han, H., Jackson, H., & Becker, C.B. (2014). Moderators and predictors of response to eating disorder risk factor reduction programs in collegiate female athletes. Eating Disorders in Sport, special issue in Psychology of Sport & Exercise (PSE).
  16. Teyhen, D.S., McClain, J., Stewart, T.M., Neal, D.N., Thorndike, F., Aldag, M., Edinborough, E., Levine, B., Ghanadian, J., Kinn, J., Parramore, D., Trabosh, V., Haught, A., & Kunkler, K. (2014). Leveraging technology: Creating & sustaining changes for health, Telemedicine and e-Health, in press.
  17. Kilpela, L., Becker, C.B., Wesley, N., & Stewart, T.M. (2014). Body Image in Adult Women: Moving Beyond the Younger Years. Advances in Eating Disorders, in press.
  18. Eric Ravussin, Leanne M. Redman, James Rochon, Sai Krupa Das, Luigi Fontana, William E. Kraus, Sergei Romashkan, Donald A. Williamson, Simin N. Meydani, Dennis T. Villareal, Steven R. Smith, Richard I. Stein, Tammy M. Scott4, Tiffany M. Stewart, Edward Saltzman, Samuel Klein, Manju Bhapkar, Corby K. Martin1, John O. Holloszy, Cheryl H. Gilhooly, Evan C. Hadley, Susan B. Roberts for the CALERIE Study Group. (2015). A two-year randomized controlled trial of human caloric restriction: feasibility and effects on predictors of health span and longevity. Journal of Gerontology: Medical Sciences, 10, 1-8.
  19. Martin, C. K., Bhapkar, B., Pittas, A. G., Pieper, C. F., Das, S. K., Williamson, D. A., Scott, T., Redman, L. M., Stein, R., Gilhooly, C. H., Stewart, T., Robinson, L., Roberts, S. B. for the CALERIE Phase 2 Study Group. (2016). Effect of calorie restriction on mood, quality of life, sleep, and sexual function in healthy nonobese adults: The CALERIE 2 randomized clinical trial. JAMA Intern Med, 176(6), 743-752. PMID: 27136347.
  20. Stewart, T.M., Beyl, R., Pollard, T., Wesley, N., Kilpela, L.S., Becker, C.B. The Female Athlete Body (FAB) Study: Rationale, Design, and Baseline Characteristics. International Journal of Methods in Psychiatric Research. Under Review.
  21. Stewart, T.M., Pollard, T., Hildebrandt, T., Beyl, R., Wesley, N., Kilpela, L.S., Becker, C.B. (2017). The Female Athlete Body (FAB) study: Rationale, design, and baseline characteristics. Contemporary Clinical Trials, 60, 63-71.
  22. Becker, C.B., Verzijl, C.L., Kilpela, L.S., Wilfred, S.A., Stewart, T.M. (2017). Body Image in Adult Women: Associations with Health Behaviors, quality of life, and functional impairment. Journal of Health Psychology, 1359105317710815.
  23. Redman, L.M., Gilmore, A., Breaux, J., Thomas, D.T., Elkind-Hirsch, K., Stewart, T., Hsia, D., Burton, J., Apolzan, J., Cain, L., Altazan, A.D., Ragusa, S., Brady, H., Davis, A., Tilford, M., Sutton, E., & Martin, C. (2017). Effectiveness of SmartMoms, a Novel eHealth Intervention for Management of Gestational Weight Gain: Randomized Controlled Pilot Trial. JMIR mHealth and uHealth, doi: 10.2196/mhealth.8228.
  24. Stewart, T.M. (2018). Why Thinking We Are Fat Won’t Help Us Improve Our Health: Finding the Middle Ground. A Commentary in Obesity, 26(7): 1115-1116,
  25. Chapa, D.A.N., Hagan, K.T., Perko, V.L., Sorokina, D.A., Alasmar, A., Becker, C.B., Thompson, R.A., Sherman, R.T., Farrell, J.G., Stewart, T.M. (2018). Development of the Athletes Relationships with Training Scale. International Journal of Eating Disorders. DOI: 10.1002/eat.22960
  26. Stewart, T.M., Pollard, T., Hildebrandt, T., Wesley, N., Kilpela, L. S., Becker, C.B. (2018). The Female Athlete Body Project project study: 18-month outcomes in eating disorder symptoms and risk factors. International Journal of Eating Disorders, DOI: 10.1002/eat.23145.
  27. Dorling, J., Bhapkar, M., Das, S., Racette, S.B., Apolzan, J.W., Fearnbach, S.N., Redman, L.M., Myers, C., Stewart, T.M., Martin, C.K., for the CALERIE Study Group. (2019). Change in food cravings, self-efficacy, and eating behaviors during a two-year calorie restriction intervention in non-obese humans. Appetite, DOI: 10.1016/j.