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The Groove Enhancement Machine (GEM): A Multi-Person Adaptive Metronome to Manipulate Sensorimotor Synchronization
Lauren K Fink1,2,3,4, Prescott C Alexander2,5, Petr Janata1,6
1Center for Mind and Brain, University of California, Davis, Davis, CA, United States.
Frontiers in Human Neuroscience
|July 5, 2022
Summary
An adaptive metronome device improves interpersonal movement synchronization. This assistive technology enhances group coordination and enjoyment, especially with auditory feedback, regardless of musical skill.
Area of Science:
- Psychology
- Human-Computer Interaction
- Music Cognition
Background:
- Interpersonal synchronization, crucial for cooperation and trust, relies on perceiving and responding to others' actions.
- Existing methods for studying synchronization often lack real-time adaptive feedback, limiting controlled investigations.
Purpose of the Study:
- To introduce and evaluate a multi-person adaptive metronome for facilitating and studying interpersonal synchronization.
- To investigate the effects of metronome adaptivity and auditory feedback on tapping performance and subjective enjoyment.
Main Methods:
- Developed an Arduino-based adaptive metronome with low temporal latency.
- Conducted five experiments (two single-tapper, three group) varying metronome adaptivity (0-100%) and auditory feedback.
- Analyzed synchronization accuracy, subjective ratings (enjoyment, in-sync, difficulty), and individual differences (musical sophistication, trait sadness).
Main Results:
- Metronome adaptivity (25-50%) significantly enhanced synchronization compared to no adaptation.
- In group settings, auditory feedback maintained enhanced synchrony at high adaptivity (70-100%); without feedback, synchrony decreased.
- Subjective ratings converged into a single factor: enjoyment, which was highest with auditory feedback at optimal adaptivity levels.
Conclusions:
- The adaptive metronome is an effective open-source tool for studying interpersonal synchrony.
- Metronome adaptivity and auditory feedback are key factors influencing both objective synchronization and subjective enjoyment.
- Individual differences like musical sophistication do not negate the benefits of adaptive synchronization technology.
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