Background Studying animal cognition in a social setting is associated with practical and
statistical challenges. However, conducting cognitive research without disturbing species …

A central premise of the science of comparative affect is that we can best learn about the
causes and consequences of affect by comparing affective phenomena across a variety of …

This comprehensive introductory text integrates evolutionary, ecological, and demographic
perspectives with new results from field studies and contemporary noninvasive molecular …

Chimpanzees' refusal of less-preferred food when an experimenter has previously provided
preferred food to a conspecific has been taken as evidence for a sense of fairness. Here, we …

Research over the last decades has shown that humans and other animals reveal
behavioral and emotional responses to unequal reward distributions between themselves …

The study of inequity aversion in animals debuted with a report of the behaviour in capuchin
monkeys (Cebus apella). This report generated many debates following a number of …

Cumulative cultural evolution (CCE), the improvement of cultural traits over generations via
social transmission, is widely believed to be unique to humans. The capacity to build upon …

The origins of evolutionary games are rooted in both economics and animal behaviour, but
economics has, until recently, focused primarily on humans. Although historically, specific …

Studies of transmission biases in social learning have greatly informed our understanding of
how behaviour patterns may diffuse through animal populations, yet within-species inter …

Highlights•Personality similarity associated with formation and maintenance of male social
bonds.•Dyadic bond strength increased with increased similarity in Gregariousness …