In case you want to see how movement speed reflects subjective utility in real time!

Snap up this opportunity that’s too good to miss—and no, I’m not talking about reading this paper! The speed with which an actor reaches for a foraging stimulus signals its value to observers, who use this to guide their own foraging behaviour.

For both experiments, estimates of how much was in the pot were higher for synchronous than asynchronous groups, demonstrating that the temporal dynamics of an interaction contain signals of a group’s level of cooperativity.

Participants watched animations of actors deciding how much to donate in a public-goods game and using a mouse to drag donations to a public pot. Participants then estimated how much was in the pot in total (as an index of how cooperative they thought the group members were).