Interpersonal heart rate synchrony predicts effective information processing in a naturalistic group decision-making...

Area of Science:

• Psychology
• Neuroscience
• Social Dynamics

Background:

• Groups often outperform individuals but risk 'groupthink' due to inadequate critical evaluation.
• Shared goals and perspectives correlate with similar brain activity patterns, enhanced by consensus discussions.
• The predictive power of shared arousal alone on collective decision-making remains unexplored.

Approach:

• Investigated interpersonal heart rate synchrony in 44 groups (n=204) during a collective decision-making task.
• Utilized multi-dimensional recurrence quantification analysis (MdRQA) and machine learning.
• Assessed the relationship between heart rate synchrony and the probability of reaching the correct consensus decision.

Key Points:

• Heart rate synchrony, a peripheral index of shared arousal, predicts group success in critical decision-making tasks.
• This physiological measure outperformed discussion duration, subjective team function, and baseline heart rates in predictive accuracy (>70% cross-validation).
• High heart rate synchrony indicates effective interpersonal engagement, crucial for adaptive learning and information sharing.

Conclusions:

• Interpersonal heart rate synchrony serves as a biomarker for effective group collaboration.
• Synchronized arousal facilitates overcoming cognitive biases and achieving optimal collective outcomes.
• This finding offers novel insights into the physiological underpinnings of successful group problem-solving.