I am an evolutionary anthropologist and engage in two primary lines of research.

1. 1.I study psychological adaptations for processing ethnic social categories. I address questions of intergroup relations and social cognition through cross-cultural and developmental research in the United States and among agro-pastoralists in the Peruvian altiplano along the Quechua-Aymara linguistic border.
   

2. 2.I am working on the Family Matters Project with Rebecca Sear to explain cross-cultural variation in how alloparents affect fertility.