Social animals are constantly faced with decisions about how to interact with other group members. My lab studies different aspects of social decision-making, which allows us to gain a full understanding of the evolution of decision-making. These can be roughly divided into two main lines of work. The first explores how the social environment influences decision-making, in particular the ways in which the identity and behavior of the partner control how subjects respond. The second explores how factors related to the individual influence how they respond in social tasks, in particular how factors beyond basic demographic features, such as subjects’ personalities or their preferences for risk and ambiguity, influence behavior in these tasks.