Exogenous testosterone increases sensitivity to moral norms in moral dilemma judgements.

Moral dilemma judgements frequently involve decisions where moral norms and the greater good are in conflict. The current preregistered study tested the effect of the steroid hormone testosterone on moral dilemma judgements using a double-blind administration of testosterone or placebo. Counter to predictions, testosterone administration led to increased inaction in moral dilemmas where harmful actions prohibited by moral norms increase overall well-being.

Sex differences in cortisol's regulation of affiliative behavior.

A contribution to a special issue on Hormones and Human Competition. A stress perspective is used to illuminate how competitive defeat and victory shape biology and behavior. We report a field study examining how change in cortisol following perceived defeat (vs.

Hormones and ethics: Understanding the biological basis of unethical conduct.

Globally, fraud has been rising sharply over the last decade, with current estimates placing financial losses at greater than $3.7 trillion annually. Unfortunately, fraud prevention has been stymied by lack of a clear and comprehensive understanding of its underlying causes and mechanisms.