Cooperation makes two less-creative individuals turn into a highly-creative pair.

This study aimed to investigate which type of group (e.g., consisting of less-creative or highly-creative individuals) would perform better in solving creativity problems, and explore the underlying inter-brain neural correlates between team members. A preliminary test (an alternative-uses task) was performed to rank individuals' level of creativity, and divide participants into three types of dyads: high-high (two highly-creative individuals), low-low (two less-creative individuals), and high-low (one highly-creative and one less-creative individual). Dyads were then asked to solve a realistic presented problem (RPP; a typical creativity problem) during which a functional near-infrared spectroscopy (fNIRS)-based hyperscanning device was used to record the variation of interpersonal brain synchronization (IBS). Results revealed that less-creative individuals, while working together, would perform as well as highly-creative individuals. The low-low dyads showed higher levels of cooperation behaviour than the other two types of dyads. The fNIRS results revealed increased IBS only for low-low dyads at PFC (prefrontal cortex) and rTPJ (right temporal-parietal junction) brain regions during RPP task performance. In the rDLPFC (right dorsolateral prefrontal cortex), the IBS in the low-low dyads was stronger than that of high-high and high-low dyads. In the rTPJ, the IBS in the low-low dyads was only stronger than that of the high-low dyads. Besides, the IBS at rDLPFC and rTPJ regions in the low-low dyads was positively correlated with their cooperation behaviour and group creative performance. These findings indicated when two less-creative individuals worked on a creativity problem together, they tended to cooperate with each other (indicated by both behaviour index and increased IBS at rDLPFC and rTPJ), which benefited their creative performance.

Xue H ，Lu K ，Hao N 《-》

Cooperation Makes a Group be More Creative.

This study investigated how cooperative and competitive interaction modes affect the group creative performance. The participants were recruited as dyads to solve 2 problems either demanding divergent thinking (alternative uses task, AUT) or not (object characteristic task, OCT). The dyads solved 1 of the 2 problems in the cooperative mode and the other in the competitive mode. Functional near-infrared spectroscopy (fNIRS)-based hyperscanning was used to record their neural activities in the prefrontal and right temporal-parietal junction (r-TPJ) regions. Results revealed the dyads showed higher AUT fluency, AUT originality, OCT fluency, and cooperation level in the cooperative mode than in the competitive mode. The fNIRS data revealed increased (task-baseline) interpersonal brain synchronization (IBS) in the right dorsolateral prefrontal cortex (r-DLPFC) and r-TPJ, only for dyads in the AUT/cooperation condition. In both r-DLPFC and r-TPJ, the IBS of dyads in the AUT/cooperation condition was stronger than in the AUT/competition and OCT/cooperation. Moreover, a stronger IBS was evoked between the regions in prefrontal and posterior temporal regions in the AUT/cooperation condition, as compared with the competition mode. These findings suggest that enhanced IBS may underlie the positive effects of cooperation as compared with the competition in terms of group creativity.

Lu K ，Xue H ，Nozawa T ，Hao N ... -  《-》

Gender of partner affects the interaction pattern during group creative idea generation.

Lu K ，Teng J ，Hao N 《-》

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.

Mayseless N ，Hawthorne G ，Reiss AL 《-》

Praising or keeping silent on partner's ideas: Leading brainstorming in particular ways.

This study aimed to investigate how different feedback affect group creative performance, and reveal the underlying interpersonal neural correlates using the functional near-infrared spectroscopy (fNIRS)-based hyperscanning technique. Participants solved one creativity task with two strangers in conditions with positive/negative/no feedback. Results revealed that performance in the negative condition was lower than in the other conditions. Moreover, results showed the highest 'index of convergence'/collective flexibility in the positive/control condition respectively. The fNIRS results demonstrated IBS increment in the frontopolar and bilateral dorsolateral prefrontal cortex, which was stronger in the positive and negative conditions. The IBS increment in the frontopolar and bilateral DLPFC covaried with group creative performance in the positive condition. The findings indicated that negative feedback suppressed the group creative performance; whereas no feedback facilitated collective flexibility and positive feedback promoted interpersonal interaction, these two feedback conditions both benefited group creative performance.

Lu K ，Qiao X ，Hao N 《-》