Interpersonal visual interaction induces local and global stabilisation of rhythmic coordination

Area of Science:

• Neuroscience
• Cognitive Science
• Biomechanics

Background:

• Perceptual coupling facilitates spontaneous interpersonal synchronisation of rhythmic movements.
• Visual interaction is a key factor influencing human movement coordination.

Purpose of the Study:

• To investigate the role of visual cues in spontaneous interpersonal synchronisation.
• To test the hypothesis that visual contact creates "anchoring" (local movement stabilisation) that supports global interpersonal synchronisation.

Main Methods:

• Re-analysis of existing data on auditory-motor coordination tasks (knee flexion/extension).
• Comparison of movement variability under conditions of visual contact (face-to-face) versus no visual contact (back-to-back).
• Analysis of individual movement trajectories and interpersonal phase relations.

Main Results:

• Visual interaction significantly decreased movement variability across most of the movement cycle.
• A notable exception to decreased variability was observed at the maximum extension position.
• The degree of local movement stabilisation (anchoring) positively correlated with the stability of interpersonal synchronisation.

Conclusions:

• Visual contact with a co-actor induces anchoring effects, stabilising individual movements.
• Anchoring plays a critical role in supporting and stabilising spontaneous interpersonal synchronisation.
• These findings highlight the importance of visual perception in coordinating rhythmic movements between individuals.