Allison Tracy , research scientist and staff methodologist for the Centers, will participate in a symposium entitled “Feminism: Methodology and Methods” as part of the Sixth International Conference on Social Science Methodology. The conference, “Recent Developments and Applications in Social Research Methodology” will be held at the University of Amsterdam, The Netherlands, August 16-20. Tracy will present her ideas regarding the use of latent variable mixture modeling, a newly available analysis method that integrates the assumption of diversity of experience with the power of large-sample statistical modeling, yielding results that honor both typical and atypical experiences. With this method, researchers can now scientifically identify qualitatively diverse subpopulations representing distinctly different experiences without anticipating those differences prior to analysis. By following up these analyses, researchers can identify and study in greater depth individuals whose experiences were not adequately captured. Tracy will illustrate this new approach with a study that shows how physical activity in adolescence influences patterns of sexual risk in different ways for different girls. This methodological tool has direct implications or the development of culturally sensitive interventions and public policies.