Overview of the experimental setup used to study brain synchronization during cooperative tasks. (I) Participants had to design the interior of a digital room together, and a computer vision system kept track of their gaze to pinpoint the social behavior of looking at the other participant’s face. (II) The participants also completed the same task individually. (III) While they completed the experiment, their brain activity was recorded. Statistical analysis was then used to assess between-brain and within-brain synchronization of various cerebral regions.