Photo of Krista Ranby
Lab Director • Associate Professor
Department of Psychology

About Dr. Ranby

Krista Ranby is an Assistant Professor in the Department of Psychology at the University of Colorado Denver and head of the Healthy Couples Lab. She comes to the study of health behavior from the perspective of social and quantitative psychology. She is particularly interested in the ways that close relationship partners affect each other’s daily health behaviors. Dr. Ranby has experience studying couples within the context of physical activity and smoking cessation. She examines naturally occurring behavior change at specific points in time (e.g., New Years resolutions, marriage, disease diagnosis, pregnancy). She is also developing ways to encourage behavior change within romantic relationshipssuch as joint planning (i.e., collaborative implementation intentions). Further, she is interested in the measurement of relationship processes that encourage healthy behaviors..

To learn more about Dr. Ranby, refer to her curriculum vitae

Selected Publications

  • Ranby, K. W. & Aiken, L. S. (in press). Incorporating husband influences into a model of physical activity among older women.British Journal of Health Psychology. doi:10.1111/bjhp.12195
  • Elliot, D. L., Goldberg, L., MacKinnon, D. P., Ranby, K. W., Kuehl, K. S., & Moe, E. L. (in press). Empiric validation of a process for behavior change. Translational Behavioral Medicine: Practice, Policy and Research. doi:10.1007/s13142-015-0343-y
  • Ross, K., Ranby, K. W., Wooldridge, J. S., Robertson, C., & Lipkus, I., M. (in press). Effects of physical and mental health on relationship satisfaction: A dyadic, longitudinal examination of couples facing prostate cancer. Psycho-Oncology.
  • vanDellen, M. R., Boyd, S. M., Ranby, K. W., MacKillop, J., & Lipkus, I. M. (in press). Willingness to provide support for a quit attempt: A study of partners of smokers. Journal of Health Psychology. doi: 10.1177/1359105314567209
  • Koval, C. Z., vanDellen, M. R., Fitzsimmons, G. M., & Ranby, K. W. (2015). The burden of responsibility: Interpersonal costs of high self-control. Journal of Personality and Social Psychology, 108(5), 750-766. doi:10.1037/pspi0000015
  • Craddock, E., vanDellen, M. R., Novak, S. A., & Ranby, K. W. (2015). Influence in relationships: A meta-analysis on health-related social control. Basic and Applied Social Psychology, 37(2), 118-130. doi:10.1080/01973533.2015.1011271
  • Lipkus, I. M., Ranby, K. W., Lewis, M. A., & Toll, B. (2013). Reactions to framing of cessation messages: Insights from dual-smoker couples. Nicotine & Tobacco Research, 15(12), 2022-2028. doi:10.1093/ntr/ntt091
  • Ranby, K. W., Lewis, M. A., Toll, B. A., Rohrbaugh, M. J., & Lipkus, I., M. (2013). Perceptions of smoking-related risk and worry among dual-smoker couples. Nicotine & Tobacco Research, 15, 734-738. doi:10.1093/ntr/ntr210
  • Ranby, K. W., Boynton, M. H., Kollins, S. H., Yang, C., McClernon, F. J., & Fuemmeler, B. F. (2012). Understanding the phenotypic structure of adult retrospective ADHD symptoms during childhood in the United States. Journal of Clinical Child & Adolescent Psychology, 41(3), 261-274. doi:10.1080/15374416.2012.654465
  • Ranby, K. W., MacKinnon, D. P., Fairchild, A. J., Elliot, D. L., Kuehl, K. S. & Goldberg, L. (2011). The PHLAME (Promoting Healthy Lifestyles: Alternative Models’ Effects) firefighter study: Testing mediating mechanisms. Journal of Occupational Health Psychology, 16(4), 501-513. doi:10.1037/a0023002  
  • Ranby, K. W., Aiken, L. S., Gerend, M. A., & Erchull, M. J. (2010). Perceived susceptibility measures are not interchangeable: Absolute, direct comparative and indirect comparative risk. Health Psychology, 29(1), 20-28. doi:
  • Ranby, K. W., Aiken, L. S., MacKinnon, D. P., Elliot, D. L., Moe, E. L., Goldberg, L., & McGinnis, W. (2009). A mediation analysis of the ATHENA intervention for female athletes: Prevention of athletic-enhancing substance use and unhealthy weight loss behaviors. Journal of Pediatric Psychology, 34(10), 1069-1083. doi:10.1093/jpepsy/jsp025