Real-life creative problem solving in teams: fNIRS based hyperscanning study.

It is often assumed that groups of individuals can work together to achieve innovation and solve complex problems they are unable to solve on their own. One of the underlying assumptions is that a group can be more creative and innovative than single individuals. Previous research has begun to examine the process by which problem solving occurs in teams looking to achieve innovation. Despite this progress, a clear, brain-based model that informs how team interactivity contributes and impacts the outcome of an innovation event is lacking. Here we present a naturalistic study designed to examine creative problem solving involving team cooperation. We used functional near infrared spectroscopy (fNIRS) to measure inter-brain synchrony (IBS) between interacting partners engaged in a creative design task. Results implicate the involvement of cognitive control coupled with the mentalizing and mirror neuron networks in IBS. Post hoc behavioral and temporal analyses revealed an increase in cooperation over time in association with reduction in IBS. Our results demonstrate the importance of a naturalistic design for investigating the neural underpinnings of team interactions as well as suggest a possible mechanism for team creativity.