Abstract Contribution to Special Issue on Fast effects of steroids. It is well documented that
testosterone concentrations change rapidly within reproductively relevant contexts (eg …

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

Oxytocin increases the salience of both positive and negative social contexts and it is
thought that these diverse actions on behavior are mediated in part through circuit-specific …

Many social behaviours are evolutionarily conserved and are essential for the healthy
development of an individual. The neuropeptide oxytocin (OXT) is crucial for the fine-tuned …

Abstract The Male Warrior Hypothesis (MWH) establishes that men's psychology has been
shaped by inter-group competition to acquire and protect reproductive resources. In this …

Objective Decades of research suggest a small, but significant positive association between
testosterone (T) and measures of aggression and mating psychology/behavior. More …

Among its many roles in body and brain, oxytocin influences social behavior. Understanding
the precise nature of this influence is crucial, both within the broader theoretical context of …

The motivation to engage in social behaviors is influenced by past experience and internal
state, but also depends on the behavior of other animals. Across species, the oxytocin (Oxt) …

Approach–avoidance generally describes appetitive motivation and fear of punishment. In a
social context approach motivation is, however, also expressed as social aggression and …

Winning aggressive disputes is one of several experiences that can alter responses to future
stressful events. We have previously tested dominant and subordinate male Syrian hamsters …