Dr. Xu's research focuses on cardiovascular & behavioral health (e.g. physical activity/sedentary behavior, weight control, and smoking), close relationships (especially romantic relationships), and neuroimaging. Dr. Xu conducts basic research in each of these areas as well as more applied research in the overlaps. Dr. Xu also researches these areas in the context of individual differences and culture. Additionally Dr. Xu is interested in pedagogy and mentoring.