The evolution of social cognition: the case of animal cooperative problem solving

A major research area in non-human social cognition is the investigation of cooperative problem solving, i.e. the cognition involved in situations when animals cooperate with each other. Social cognition is thought to have evolved due to the demands of social living, and is often thought to present an adaptive specialisation for living in groups. A previous analysis of social learning, another area of social cognition, has highlighted how this has consequently led to two overarching biases in the literature: firstly, a bias towards testing only social species, and secondly, an a priori assumption that social learning is qualitatively different from learning involved in non-social situations. The problem of these biases may not restricted to social learning but be present also in other areas of social cognition research. Applying an equivalent analysis to cooperative problem solving shows that here too both biases are present. Firstly, empirical studies on cooperative problem solving primarily conducted with social species and species that exhibit cooperative behaviours in the wild. Secondly, the assumption that cooperative problem solving relies on a distinctly socialcognitive ability can, at least implicitly, be observed throughout the literature. Thismay be the result of confounding different components of the cognitive process involved in cooperation: what information is required to successfully cooperate and how this information is acquired. While the former needs to involve information about another individual, there is no indication that the latter is required to differ from any known, domain-general cognitive mechanism. These two biases make it difficult to systematically test whether and how cooperation differs between species, and as such impede investigations into the evolution of cooperative problem solving.