Simultaneous self-other integration and segregation support real-time interpersonal coordination in a musical joint...

Area of Science:

• Cognitive Neuroscience
• Music Psychology
• Human-Computer Interaction

Background:

• Successful joint action, like ensemble music, relies on distinguishing self from other actions.
• Precise interpersonal coordination is crucial for shared perceptual experiences in group performance.

Purpose of the Study:

• To investigate if simultaneous integration and segregation of self-other information enhance musical joint action coordination.
• To test how auditory and motor sensory feedback influences interpersonal synchronization.

Main Methods:

• A dyadic synchronization task was conducted with 16 pairs using electronic music boxes.
• Independent variables included pitch relationships (same/different) and movement frequency congruence (congruent/incongruent).
• A repeated measures design analyzed coordination accuracy under varied sensory feedback conditions.

Main Results:

• Interpersonal coordination accuracy was highest with different pitches and congruent movement frequencies.
• Poor coordination, including desynchronization, was observed with same pitches and incongruent movements.
• Auditory streaming (pitch segregation) and visuo-motor coupling (movement integration) played asymmetrical roles.

Conclusions:

• Joint action coordination benefits from a dynamic balance between integrating and segregating self-other sensory information.
• Asymmetrical sensory processing, favoring pitch segregation and movement integration, facilitates precise temporal coordination.
• This balance allows performers to maintain individual control while adapting to a partner's timing.