Peter Gray : Charles Drew University

Two hallmarks of human male reproductive strategies are the formation of long-term bonds with a mate and the provision of paternal care. These activities may, in part, be exclusive to male-male competition and mate-seeking, the main components of mating effort. From a complementary, mechanistic perspective, the steroid hormone testosterone (T) may modulate behavioral allocation to male mating and parenting effort. I present a growing body of evidence addressing this proposition. This evidence includes four studies that colleagues and I have conducted in the U.S. as well as data on Kenyan Swahili men that help provide a cross-cultural perspective.
http://www.bec.ucla.edu/papers/Gray_10-20-03.pdf