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Updated: Jun 26, 2026
04:44
Inter-Brain Synchrony in Open-Ended Collaborative Learning: An fNIRS-Hyperscanning Study
Published on: July 21, 2021
Synchrony and cooperation
Scott S Wiltermuth1, Chip Heath
1Department of Organizational Behavior, Stanford University, CA 94305, USA. scwilter@stanford.edu
Psychological Science
|January 21, 2009
Summary
Synchronous activities, like marching or singing, boost group cooperation by strengthening social bonds, even without positive emotions. This helps solve the free-rider problem in collective efforts.
Area of Science:
- Social Psychology
- Behavioral Economics
- Anthropology
Background:
- Group activities like marching, singing, and dancing often involve synchronized actions.
- Synchrony is theorized to foster positive emotions and reduce self-group boundaries.
- The free-rider problem challenges group motivation for collective action.
Purpose of the Study:
- To investigate if synchronous activity can mitigate the free-rider problem.
- To determine if synchrony enhances cooperation in group tasks.
- To explore the role of positive emotions in synchrony-induced cooperation.
Main Methods:
- Three experiments were conducted involving participants engaging in synchronous activities.
- Cooperation levels were measured in subsequent group economic exercises.
- The influence of positive emotions on cooperation was also assessed.
Main Results:
- Individuals acting in synchrony demonstrated increased cooperation in group economic tasks.
- This effect persisted even when personal sacrifice was required.
- Synchrony fostered cooperation independently of whether positive emotions were generated.
Conclusions:
- Synchronous activity can serve as a mechanism to increase cooperation within groups.
- Strengthening social attachment appears to be the key factor linking synchrony and cooperation.
- Synchrony offers a potential solution to motivating collective contribution and overcoming the free-rider problem.
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