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Area of Science:

  • Complex systems
  • Social dynamics
  • Collective behavior

Background:

  • Collective movement shows emergent order in various systems.
  • In social contexts, alignment stems from interpersonal interaction, not locomotion.

Purpose of the Study:

  • Investigate distance-dependent social alignment in preschool children.
  • Uncover the mechanisms driving orientation transitions in group behavior.

Main Methods:

  • Collected high-resolution spatial and orientation data in preschool classrooms.
  • Analyzed pairwise alignment transitions using Fourier decomposition.
  • Developed a minimal pseudopotential model and Monte Carlo simulations.

Main Results:

  • Observed a sharp transition in pairwise alignment around 0.65 meters.
  • Identified distance-dependent competition between parallelization, opposition, and reciprocation.
  • Modeled the transition as a nonequilibrium phase change.

Conclusions:

  • Social alignment exhibits a spontaneous symmetry breaking based on distance.
  • The study provides a quantitative framework for understanding social alignment.
  • Findings have implications for biological collectives and artificial swarms.