The purpose of this study is to explore the impact of the impostor phenomenon on the functioning of doctoral psychology students. The research is important because feelings of impostorism among doctors have been found to lead to poor care outcomes for their patients and there is limited research on the impostor phenomenon among doctoral psychology students. A correlational design was used to determine if a relationship exists between the impostor phenomenon and depression or anxiety among doctoral psychology students. Participants were recruited through email and data was collected through self-report measures. The results of the study discovered a significant medium positive correlation between the impostor phenomenon and both depression and anxiety. The research fills a gap in the existing literature regarding the impostor phenomenon and doctoral psychology students, however, further research should be conducted into the causes of the impostor phenomenon and interventions to mitigate its effects. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]