Hyperscanning allows multiple subjects, each in a separate MRI scanner, to interact with one another while their brains are simultaneously scanned. This technology allows researchers to study the brain responses that underlie important social interactions.
Human behavior is not endlessly variable, but can be captured and quantified by testable laws. Modern neuroscience techniques can now characterize individual differences in decision-making behavior and link those differences to such variables as brain anatomy.
Using a trust game played by two people, Computational Psychiatry Unit scientists have found that reciprocity expressed by one player strongly predicts the future trust of the other player, a behavioral finding that is mirrored by neural responses in the dorsal striatum.