Rebecca L. Chancellor, Ph.D.

Rebecca L. Chancellor, Ph.D.
  • Professor of Psychology 
  • Ph.D., University of California, Davis
  • Office: Old Library 201 & Wayne Hall 531
  • Phone: 610-436-2228
  • Email: 

Office Hours: Spring 2024

In-Person Hours are Located in Wayne Hall 531:

  • Tuesday and Thursday 10:00-11:00AM 
  • Wednesday 12:00-1:00 PM 


  • Monday 10:00-12:00 PM


Courses Typically Taught

  • PSY335 Animal Behavior
  • PSY246 Research Methods
  • ANT/PSY230 Introduction to Primatology

Brief Description of Research Interests

My research focuses broadly on understanding the ecological underpinnings of social behavior. In my earlier research I asked how feeding competition affects social relationships, paying close attention to the role of food distribution and abundance on female affiliative and aggressive behavior. I conducted this research on gray-cheeked mangabeys (Lophocebus albigena) in Kibale National Park, Uganda and on rhesus macaques (Macaca mulatta) at the California National Primate Research Center. I am currently asking how the ecological constraint of living in fragmented habitats influences social behavior, feeding competition, and cultural behavior including tool use in chimpanzees (Pan troglodytes schweinfurthii) living in Gishwati Forest Reserve, Rwanda.

Representative Publications

  • Kühl, H. S., Kalan, A. K., Arandjelovic, M., Aubert, F., D'Auvergne, L., Goedmakers, A.,…Chancellor, R., …Boesch, C. (2016). Chimpanzee accumulative stone throwing. Scientific Reports, 6, 22219; doi: 10.1038/srep22219.
  • Arlet, M. E., Isbell, L. A., Kaasik, A., Molleman, F., Chancellor, R. L., Chapman, C. A., Mänd, R., Carey, J. R. (2015). Determinants of reproductive performance among female gray-cheeked mangabeys (Lophocebus albigena) in Kibale National Park, Uganda. International Journal of Primatology, 36, 55-73.
  • Tranquilli, S., Abedi-Lartey, M., Abernethey, K., Amsini, F., Arranz, L., Asamoah, A., …Chancellor, R., …Sommer, V. (2014). Protected areas in tropical Africa: assessing threats and conservation activities. PLoS ONE 9(12): e114154. doi:10.1371/journal.pone.0114154.
  • Arlet, M. E., Isbell, L. A., Molleman F., Kaasik, A., Chancellor, R. L., Chapman, C. A., Mänd, R., & Carey, J. R. (2014). Maternal investment and infant survival in gray-cheeked mangabeys (Lophocebus albigena). International Journal of Primatology, doi: 10.1007/s10764-014-9754-8.
  • Arlet, M. E., Molleman, F., Isbell, L. A., Chancellor, R. L., Carey, J. R., Mänd, R. (2013). Correlations between social context and fecal glucocorticoid metabolite concentrations in free-ranging female gray-cheeked mangabeys (Lophocebus albigena) in Kibale National Park, Uganda. Folia Biologica, 61, 239-246.
  • Chancellor, R. L., Langergraber, K., Ramirez, S., Rundus, A. S., & Vigilant, L. (2012). Genetic sampling of unhabituated chimpanzees (Pan troglodytes schweinfurthii) in Gishwati Forest Reserve, an isolated forest fragment in western Rwanda. International Journal of Primatology, 33, 479-488.
  • Chancellor, R. L., Rundus, A. S., & Nyandwi, S. (2012). The influence of seasonal variation on chimpanzee (Pan troglodytes schweinfurthii) fallback food consumption, nest group size, and habitat use in Gishwati, a montane rainforest fragment in Rwanda. International Journal of Primatology, 33, 115-133.
  • Chancellor, R. L., Satkoski, J., George, D., Olupot, W., Lichti, N., Smith, D. G., & Waser, P. (2011). Do dispersing monkeys follow kin? Evidence from gray-cheeked mangabeys Lophocebus albigena. International Journal of Primatology, 32, 474-490.
  • Janmaat, K. R. L., & Chancellor, R. L. (2010). Exploring new areas: How important is long-term spatial memory for mangabey (Lophocebus albigena johnstonii) foraging efficiency? International Journal of Primatology, 31, 863-886.
  • Chancellor, R. L., & Isbell, L. A. (2009). Food site residence time and female competitive relationships in wild gray-cheeked mangabeys (Lophocebus albigena). Behavioral Ecology and Sociobiology, 63, 1447-1458.
  • Chancellor, R. L., & Isbell, L. A. (2009). Female grooming markets in a population of gray-cheeked mangabeys (Lophocebus albigena). Behavioral Ecology, 20, 79-86.
  • Chancellor, R. L., & Isbell, L. A. (2008). Punishment and competition over food in captive rhesus macaques (Macaca mulatta). Animal Behaviour, 75, 1939-1947.

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