BEHAVIORAL AND BRAIN SCIENCES (2015), Page 1 of 58 doi:10.1017/S0140525X14000430, e130 Political diversity will improve social psychological science1 José L. Duarte Department of Psychology, Arizona State University, Tempe, AZ 85281
[email protected] http://joseduarte.com Jarret T. Crawford Psychology Department, The College of New Jersey, Ewing, NJ 08628
[email protected] http://crawford.pages.tcnj.edu/ Charlotta Stern Department of Sociology, Institute for Social Research, Stockholm University, SE-10691 Stockholm, Sweden lotta.stern@sofi.su.se http://www2.sofi.su.se/∼lst/ Jonathan Haidt Stern School of Business, New York University, New York, NY 10012
[email protected] http://www.stern.nyu.edu/faculty/bio/jonathan-haidt Lee Jussim Department of Psychology, Rutgers University, New Brunswick, NJ 08901
[email protected] www.rci.rutgers.edu/∼jussim/ Philip E. Tetlock Psychology Department, Wharton School, University of Pennsylvania, Philadelphia, PA 19104
[email protected] http://www.sas.upenn.edu/tetlock/ Abstract: Psychologists have demonstrated the value of diversity – particularly diversity of viewpoints – for enhancing creativity, discovery, and problem solving. But one key type of viewpoint diversity is lacking in academic psychology in general and social psychology in particular: political diversity. This article reviews the available evidence and finds support for four claims: (1) Academic psychology once had considerable political diversity, but has lost nearly all of it in the last 50 years. (2) This lack of political diversity can undermine the validity of social psychological science via mechanisms such as the embedding of liberal values into research questions and methods, steering researchers away from important but politically unpalatable research topics, and producing conclusions that mischaracterize liberals and conservatives alike.