Open Access Honors Program Thesis
Dr. Catherine Desoto, Honors Thesis Advisor, Psychology
Exclusion, Intergroup Threat, Ingroup, Outgroup, Prejudice, Cortisol
Previous research shows that both exclusion and intergroup threat can increase prejudice and biological markers such as cortisol. Exclusion from an outgroup should increase prejudice and cortisol more than similar interactions in an ingroup since it incorporates both exclusion and intergroup threat. Change in cortisol and prejudice was examined in fifty participants who were excluded by either a politically-based ingroup or outgroup. Two t-tests were conducted to examine the change in a) cortisol and b) prejudice as a function of experimental ingroup/outgroup conditions. Additional analyses were also conducted to further explore cortisol changes and similarity. Cortisol increased more in participants excluded by an outgroup compared to those excluded by an ingroup. Prejudice change was not different between conditions. Additionally, cortisol increase is negatively correlated with increasing similarity.
Year of Submission
Department of Psychology
University Honors Designation
A thesis submitted in partial fulfillment of the requirements for the designation University Honors
1 PDF file (vii, 25 pages)
©2019 Hannah Rose Lentfer
Lentfer, Hannah Rose, "Effects of political ingroup/outgroup rejection on behavior and physiology" (2019). Honors Program Theses. 370.