Although animal researchers established the role of testosterone as a 'social
hormone'decades ago, the investigation of its causal influence on human social behaviors …

This research investigates the link between rivalry and unethical behavior. We propose that
people will be more likely to engage in unethical behavior when competing against their …

A contribution to a special issue on Hormones and Human Competition. This manuscript
reviews the current literature on the actions of the steroid hormones testosterone and …

Evolutionary leadership theory (ELT) argues that humans possess specialized
psychological mechanisms for solving coordination problems through leadership and …

Two experiments examined the psychological and biological antecedents of hierarchical
differentiation and the resulting consequences for productivity and conflict within small …

Recent research has identified men's facial width-to-height ratio (fWHR) as a reliable
predictor of aggressive tendencies and behavior. Other research, however, has failed to …

The current investigation explores how power and stability within a social hierarchy interact
to affect risk taking. Building on a diverse, interdisciplinary body of research, including work …

Although a great deal of research has examined specific behaviors that positively affect
leaders' negotiation processes and outcomes, there has been considerably less attention …

Gene-culture co-evolution emphasizes the joint role of culture and genes for the emergence
of altruistic and cooperative behaviors and behavioral genetics provides estimates of their …

Testosterone affects human social behavior in various ways. While testosterone effects are
generally associated with muscular strength and aggressiveness, human studies also point …