Dr. Feenstra is a social psychologist with research interests in social support, volunteering, and service-learning. Her research has been published in the Journal of College Student Development, Teaching of Psychology, Journal of Psychology and Christianity, and the Journal of Education and Christian Belief and she has made presentations at the annual meeting of the Society for Personality and Social Psychology and the American Psychological Association Annual Convention. She serves as the faculty adviser for Northwestern's chapter of Psi Chi, the national honor society in psychology.
Dr. Feenstra was named a Fulbright Scholar in 2011-12 and awarded a sabbatical to teach and do research in Romania. Working with Romanian colleagues at Babes-Bolyai University and the New Horizons Foundation, she looked at the effects of New Horizons Foundation programs on the development of social capital in Romanian youth. The director of Northwestern's Honors Program, Feenstra received Northwestern's 2017 Faculty Inspirational Service Award. She was appointed to the Northwestern College Endowed Professorship in 2021.