Professor Mannix's research and teaching interests include effective performance in managerial teams, diversity, power and alliances, negotiation and conflict, and organizational change and renewal. Recently, she has been studying the effects of power in diverse teams.
Mannix's work has been published in such journals as Administrative Science Quarterly, Psychological Science in the Public Interest, Organizational Behavior and Human Decision Processes, Journal of Experimental Social Psychology, Journal of Personality and Social Psychology, Journal of Applied Psychology, and the Academy of Management Journal. She is the co-editor of the book series Research on Managing Groups and Teams, now in its 15th volume. Her work has been recognized by awards from organizations such as the Academy of Management, Small Group Research, and the International Association for Conflict Management. At Cornell University Mannix was the director of the Institute for the Social Sciences from 2005-2008, established to promote interdisciplinary research and to increase the university's prominence in the social sciences. Mannix is also the recipient of Johnson’s inaugural EMBA Globe teaching award as well as the Faculty Research Award. She is a Fellow of the American Psychological Society and the Society for Organizational Behavior.