My research interests include evolutionary and cross-cultural  approaches to understanding personal relationships, sexual strategies, romantic attachment styles, and gender differences in human mating. I am also interested in the "Big Five" model of personality traits, risk  factors for HIV/AIDS, and predictors of both sexual aggression and  intimate partner violence across cultures. 

I am Founding Director of the International Sexuality Description Project (Schmitt  et al., 2003), a cross-cultural survey that included samples from 56  nations representing six continents, 13 islands, and 28 languages. The second wave of the ISDP (the ISDP-2) has also been completed, involving more than 200 research collaborators and 34,000 research participants across 58 nations. If you are interested in finding out more about the ISDP, please contact Dr. Schmitt at Bradley University.