Katherine C. (KC) Haydon


  • Associate Professor of Psychology and Education
  • Co-Chair of Psychology and Education
Katherine (K.C.) Haydon

KC Haydon’s research examines the developmental origins of how people behave in their closest relationships. One central question in her work is how romantic partners’ individual developmental histories affect what happens in their current relationship – how they resolve conflicts, regulate and express emotions, and support each other. She also studies how close relationships with parents, friends, and romantic partners contribute to developmental outcomes, such as navigating the transition to adulthood. Haydon’s research is guided by the premise that such outcomes are probabilistically shaped by experiences in multiple contexts.

Areas of Expertise

Attachment processes in adolescence and adulthood; romantic relationship development and maintenance processes; physiological correlates of relationship functioning; close relationships as developmental contexts across the lifespan


  • Ph.D., University of Minnesota
  • A.B., Mount Holyoke College


Recent Campus News

KC Haydon’s research suggests that cannabis users aren’t as good as they think they are when it comes to dealing with conflicts in their relationships.

Mount Holyoke’s KC Haydon flipped her classroom to make discussion and building community among her students the focus of her course.

Mount Holyoke honored four professors for their scholarship and teaching at the annual Faculty Awards ceremony in early March, prior to the closing of campus.

Recent Publications

Haydon, K.C. & Salvatore, J. E. (2023). Relationship stress, arguments, and sleep quality: A within-subjects causal process analysis. Journal of Social and Personal Relationships. DOI: 10.1177/02654075231190592

Haydon, K. C., & Salvatore, J. E. (2021). A prospective study of mental health, well-being, and substance use during the initial COVID-19 pandemic surge. Clinical Psychological Science, 21677026211013499.

Haydon, K. C., & Moss, C. (2020). Attachment and sleep: A dyadic intensive longitudinal actigraphy study. Journal of Social and Personal Relationshipshttps://doi.org/10.1177/0265407520958476.  

Haydon, K.C., Woronzoff-Dashkoff, A., & Murphy, K. (2020). Who's the boss? How and when process power moderates partner regulation of attachment defenses. Journal of Social and Personal Relationships. https://doi.org/10.1177/0265407519900013

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