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Secondary tasks impair adaptation to step- and gradual-visual displacements
J M Galea1, S A Sami, N B Albert
1Behavioural Brain Sciences, School of Psychology, University of Birmingham, Birmingham, UK. jgalea1@jhmi.edu
Experimental Brain Research
|January 27, 2010
Summary
Cognitive load impairs motor adaptation. Both dividing attention and switching tasks slow adaptation, with combined tasks causing greater impairment, highlighting the impact of cognitive demands on motor learning.
Area of Science:
- Motor control
- Cognitive neuroscience
- Human adaptation
Background:
- Motor adaptation is crucial for adjusting movements.
- Cognitive resources and task switching can interfere with motor adaptation.
- Previous work showed task switching slows adaptation.
Purpose of the Study:
- To investigate if cognitive resource division impacts motor adaptation similarly to task switching.
- To compare the effects of secondary tasks and switching on adaptation rate.
- To examine the combined effect of these manipulations.
Main Methods:
- Participants adapted to visual displacement under secondary task conditions (vocal shadowing).
- Adaptation was also tested during switching between opposing visual displacements.
- Experiments involved both step and gradual visual displacement adaptation.
Main Results:
- Both secondary tasks and switching significantly slowed adaptation rate.
- Combining the secondary task and switching further decreased adaptation rate.
- Gradual adaptation was more affected by prior step adaptation than vice versa.
Conclusions:
- Cognitive resource division and task switching similarly impair motor adaptation.
- Awareness and cognitive resource are distinct but related; awareness may indicate resource demand.
- Even seemingly effortless adaptation can be disrupted by cognitive load.
