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A Time-Varying Measure of Dyadic Synchrony for Three-Dimensional Motion.

Philip T Reiss1, Hila Z Gvirts2,3, Rotem Bennet4

  • 1a Department of Statistics , University of Haifa.

Multivariate Behavioral Research
|April 9, 2019
PubMed
Summary

We developed a new method to measure synchronized 3D motion in pairs using velocity vector cosine. This approach, analyzing leader-follower dynamics, positively correlates with cognitive empathy.

Keywords:
Empathyinterpersonal synchronyleader-follower dynamicsspline smoothingthree-dimensional motiontranscranial direct current stimulation

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Area of Science:

  • Behavioral science
  • Movement analysis
  • Empathy research

Background:

  • Analyzing synchronized movement in dyads is crucial for understanding social interactions.
  • High-resolution motion data offers rich insights into interpersonal dynamics.

Purpose of the Study:

  • To introduce a novel method for quantifying three-dimensional (3D) dyadic synchrony.
  • To extend the method for analyzing leader-follower dynamics using time-lagged synchrony.
  • To investigate the relationship between dyadic synchrony and cognitive empathy.

Main Methods:

  • Dyadic motion data was captured at high temporal resolution.
  • Spline smoothing was applied to preprocess motion data across three spatial dimensions.
  • Dyadic synchrony was quantified using the cosine of estimated velocity vectors at each time point.
  • A time-lagged analysis was incorporated to identify leader-follower patterns.
  • Mean square cosine was computed as a scalar measure of overall dyadic synchrony.

Main Results:

  • The proposed method effectively quantifies synchronized 3D motion in dyads.
  • The analysis revealed significant associations between dyadic synchrony measures and cognitive empathy.
  • The time-lagged extension successfully identified leader-follower dynamics.

Conclusions:

  • The novel cosine-based approach provides a robust measure of dyadic synchrony.
  • This method offers valuable insights into the dynamics of synchronized movement and its connection to empathy.
  • The findings support the role of synchronized motion in interpersonal connection and social cognition.