Synchronicities that shape the perception of joint action.

Area of Science:

• Cognitive Psychology
• Social Psychology
• Motor Control

Background:

• Expert performers in joint actions synchronize movements with high precision.
• Experts achieve fine-grained temporal alignment (velocity-based synchrony), unlike novices who synchronize interval durations.

Purpose of the Study:

• To investigate the impact of velocity-based synchrony on observers' perception of coordination.
• To examine how velocity-based synchrony influences the aesthetic experience of joint performances.

Main Methods:

• Participants observed animations of two moving dots representing joint improvisation.
• Animations depicted either velocity-based synchrony (expert-like) or interval-based synchrony (novice-like).
• Velocity-based synchrony was manipulated via velocity profile jitter (Exp 1) or alignment sharpness (Exp 2).

Main Results:

• Joint performances with velocity-based synchrony were perceived as more coordinated.
• Observers rated performers in velocity-synchronized actions as liking each other more.
• Velocity-based synchrony led to higher ratings of beauty and a stronger aesthetic experience.

Conclusions:

• Subtle timing cues in joint actions, specifically velocity synchrony, fundamentally shape observer experience.
• Velocity-based synchrony enhances perceptions of coordination, performer rapport, and aesthetic appeal.
• The findings highlight the importance of fine-grained temporal dynamics in social interaction and performance evaluation.