Anybody watching? How others affect helpful actions.

A new study by Havlik et al. (Science Advances, 6(28), eabb4205, 2020) reveals that rats are less likely to help a conspecific in need in the presence of passive bystanders, but that they are more likely to help when there are active bystanders that engage in helping. This study highlights the social skills of rats and the role of bystanders on cooperation, raising a range of interesting questions that should be explored both theoretically and empirically.