Donna Spruijt-Metz, professor of psychology (research) and director of the Mobile Health Collaboratory at USC’s Center for Social and Economic Research,  and Kayla de la Haye, assistant professor of preventive medicine at the Keck School of Medicine of USC, have teamed up with researchers at the University of Virginia’s School of Engineering and Applied Science to devise a data-driven method for combating obesity. But instead of focusing on what people eat, the study will observe family dynamics while eating — and what triggers overeating.