Does Competition Really Bring Out the Worst? Testosterone, Social Distance and Inter-Male Competition Shape Parochial Altruism in Human Males

New evidence on testosterone and cooperation

(2012) Jack van Honk et al.   NATURE

The neural mechanisms by which testosterone acts on interpersonal trust

(2012) Peter A. Bos et al.   NEUROIMAGE

Social cognition in members of conflict groups: behavioural and neural responses in Arabs, Israelis and South Americans to each other's misfortunes

(2012) E. G. Bruneau et al.   PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Evolution and the psychology of intergroup conflict: the male warrior hypothesis

(2012) M. M. McDonald et al.   PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Sex Matters during Adolescence: Testosterone-Related Cortical Thickness Maturation Differs between Boys and Girls

(2012) Jennifer E. Bramen et al.   PLoS One

Rejection of unfair offers in the ultimatum game is no evidence of strong reciprocity

(2012) T. Yamagishi et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Testosterone disrupts human collaboration by increasing egocentric choices

(2012) N. D. Wright et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Responding to Unfair Offers Made by a Friend: Neuroelectrical Activity Changes in the Anterior Medial Prefrontal Cortex

(2011) C. Campanha et al.   JOURNAL OF NEUROSCIENCE

Punishment sustains large-scale cooperation in prestate warfare

(2011) S. Mathew et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Testosterone administration impairs cognitive empathy in women depending on second-to-fourth digit ratio

(2011) J. van Honk et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Costly punishment prevails in intergroup conflict

(2011) L. Saaksvuori et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Conflict, sticks and carrots: war increases prosocial punishments and rewards

(2011) A. Gneezy et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

The role of testosterone in social interaction

(2011) Christoph Eisenegger et al.   TRENDS IN COGNITIVE SCIENCES

Racial Bias Reduces Empathic Sensorimotor Resonance with Other-Race Pain

(2010) Alessio Avenanti et al.   CURRENT BIOLOGY

Neural Responses to Ingroup and Outgroup Members' Suffering Predict Individual Differences in Costly Helping

(2010) Grit Hein et al.   NEURON

Testosterone decreases trust in socially naive humans

(2010) P. A. Bos et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

When are low testosterone levels advantageous? The moderating role of individual versus intergroup competition

(2009) Pranjal H. Mehta et al.   HORMONES AND BEHAVIOR

Prejudice and truth about the effect of testosterone on human bargaining behaviour

(2009) C. Eisenegger et al.   NATURE

Testosterone Administration Decreases Generosity in the Ultimatum Game

(2009) Paul J. Zak et al.   PLoS One

Amygdala activity to fear and anger in healthy young males is associated with testosterone

(2009) Birgit Derntl et al.   PSYCHONEUROENDOCRINOLOGY

Did Warfare Among Ancestral Hunter-Gatherers Affect the Evolution of Human Social Behaviors?

(2009) S. Bowles   SCIENCE

On passion and sports fans: A look at football

(2008) Robert J. Vallerand et al.   JOURNAL OF SPORTS SCIENCES

Testosterone responses to competition predict future aggressive behaviour at a cost to reward in men

(2008) Justin M. Carré et al.   PSYCHONEUROENDOCRINOLOGY

Exogenous Testosterone Enhances Responsiveness to Social Threat in the Neural Circuitry of Social Aggression in Humans

(2007) Erno J. Hermans et al.   BIOLOGICAL PSYCHIATRY