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Neuroscience

Who Is in Mind Matters: Attachment Representations in Early Childhood Synchronize Child-Adult Interacting Brains

Ruxin Su, Jiayang Xu, Saishuang Wu, Haiwa Wang, Yamin Li, Zihan Yang, Yuqi Liu, Jieqiong Liu, Shanbao Tong, Yunting Zhang, Xiaoli Guo, Fan Jiang

Featured June 10, 2026

Original Paper

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Simply

Believing you're playing with your mom makes your brain 'sync up' more with your partner, even if it's actually a stranger, showing that internal feelings about mom drive brain connection.

In depth
The study reveals that a child's internalized attachment representations of their mother can independently drive interbrain synchrony, even when the mother is not physically present or is replaced by a stranger. By manipulating a child's belief about their interaction partner, the authors demonstrate that believing one is with their mother significantly enhances neural alignment, particularly in the child's right temporoparietal junction (P4 channel), suggesting these representations act as an endogenous driver of social engagement and neural coordination.

Key Takeaways

  • 1
    The paper introduces a novel Remote Partner-Belief Manipulation paradigm to isolate the effect of internal attachment representations on interbrain synchrony, controlling for confounding social cues.
  • 2
    Children's belief that they are interacting with their mother significantly enhances interbrain synchrony in the theta band, regardless of the actual partner, indicating that internalized attachment representations are an independent driver of neural alignment.
  • 3
    This belief-driven synchrony is localized to the child's P4 channel (right temporoparietal junction) and correlates with secure attachment scores and faster reaction times, suggesting a mechanism involving heightened attention towards the attachment figure.

Conceptual Flow

HIGH LEVEL
1
Methodology: Tricking the Brain to See Mom

Scientists made kids think they were playing with their mom, even when it was a stranger, to see how their brain reacted.

Child's Brain
Adult's Brain
Measure Brain Waves
Brain Connection Score
2
Results: Mom-Belief Boosts Brain Sync

When kids thought they were with mom, their brains connected more strongly with their partner's brain, showing that just thinking about mom helps.

Belief: With Mom
Belief: With Stranger
Compare Brain Connection
Stronger Connection
Weaker Connection