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Effects of visual and auditory guidance on bimanual coordination complexity
Daniela V Vaz1, Bruce A Kay2, Michael T Turvey2
1Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627 - Pampulha, Belo Horizonte, MG 31270-901, Brazil; University of Connecticut, Department of Psychology, 406 Babbidge Road, Unit 1020, Storrs, CT 06269-1020, United States.
Human Movement Science
|March 22, 2017
Summary
Perceptual guidance simplifies complex movements but alters underlying dynamics. Visual guidance increases randomness, while temporal guidance affects movement periods, impacting performance and retention.
Area of Science:
- Motor control
- Human-computer interaction
- Cognitive neuroscience
Background:
- Perceptual guidance, using visual or temporal cues, enhances complex motor task performance.
- Guidance can overcome inherent coordination constraints, allowing for movement patterns beyond typical in-phase and anti-phase.
- However, the impact of different guidance modalities on movement dynamics remains unclear.
Purpose of the Study:
- To investigate whether visual and auditory guidance produce qualitatively different dynamical organizations of movement.
- To compare the effects of no guidance, temporal guidance, and visual guidance on bimanual coordination dynamics.
- To analyze changes in temporal correlations and complexity during an anti-phase wrist coordination task.
Main Methods:
- An anti-phase wrist flexion-extension coordination task was performed under three conditions: no guidance, temporal guidance (metronome), and visual guidance (Lissajous plot).
- Detrended Fluctuation Analysis (DFA) was used to measure temporal correlations in time series of amplitudes, periods, and relative phases.
- Multiscale entropy (MSE) was employed to assess complexity levels of these time series.
Main Results:
- Visual guidance led to temporal correlations deviating from 1/f scaling towards randomness for amplitudes and relative phases.
- Temporal guidance resulted in period time series also showing more random variations.
- Complexity (MSE) was reduced under visual guidance for all time series, but increased for periods under temporal guidance.
Conclusions:
- Perceptual guidance enhances performance by simplifying task goals.
- This simplification is accompanied by significant changes in movement dynamics, including altered temporal correlations and complexity.
- These dynamic changes may explain task dependence and poor retention observed after practice with guidance.
