Research on testosterone-behavior relationships in humans is assessed in relation to a
version of the challenge hypothesis, originally proposed to account for testosterone …

A large body of evidence indicates that individual differences in baseline concentrations of
testosterone (T) are only weakly correlated with human aggression. Importantly, T …

Where did we come from? What is our connection with other life forms? What are the
mechanisms of mind that define what it means to be a human being? Evolutionary …

High facial width-to-height ratio (fWHR) has been associated with a cluster of behavioural
traits in men, including aggression and status-striving. This association between face …

Many human behaviors, from mating to food acquisition and aggressiveness, entail some
degree of risk. Testosterone, a steroid hormone, has been implicated in a wide range of …

Research conducted in the last fifteen years has placed in question many of the traditional
conclusions scholars have formed about human female sexuality. Though conventional …

The authors report a field experiment with skateboarders that demonstrates that physical risk
taking by young men increases in the presence of an attractive female. This increased risk …

Financial and prosocial biases in favor of attractive adults have been documented in the
labor market, in social transactions in everyday life, and in studies involving experimental …

Adaptationist models of human mating provide a useful framework for identifying subtle,
biologically based mechanisms influencing cross-gender social interaction. In line with this …

How can we best discover the ultimate, evolved functions of endocrine signals within the
field of human behavioral endocrinology? Two related premises will guide my proposed …