This study investigated how music, specifically chord progressions, might facilitate social bonding between pairs of people. Researchers had 20 participant pairs listen to two musical conditions — one with structured, predictable chord progressions and one with unstructured, unpredictable arrangements of the same notes — while measuring brain activity using functional near-infrared spectroscopy.
Results showed that combining live face-to-face gaze with the structured chord progressions activated regions associated with social and sensory processing, including the right angular gyrus, somatosensory association cortex, and prefrontal cortex. Feelings of subjective connectedness were linked to activity in the temporal gyri during face gazing and the angular gyrus during chord progression listening.
Overall, the findings suggest that structured, predictable music may promote social bonding by aligning listeners’ neural responses to shared acoustic patterns, particularly when paired with direct eye contact.
Key Facts & Findings
- The “Consonant” Effect: Researchers used pleasant, predictable chord progressions typical of Jazz and Pop music. These harmonious sounds acted as a physiological primer, enhancing participants’ sense of connection with the person sitting across from them.
- The Brain’s Social Hub: Using functional near-infrared spectroscopy (fNIRS), researchers observed increased brain activity in regions linked to social perception and emotional processing while participants listened to harmonious music.
- A Scientific Mirror: For the first time, a direct link was established between participants’ subjective feeling of being “in sync” with someone and measurable activity in their brain’s social regions.
- The “Scrambled” Control: When music was absent or its notes rearranged into dissonant, unpredictable patterns, the social bonding effect disappeared entirely.
- Imaging in Action: Unlike traditional MRI, which confines participants to a stationary tube, fNIRS allowed pairs to sit face-to-face and make eye contact — capturing the brain operating in its natural social environment.
