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Related Experiment Video

Updated: Jun 28, 2026

Corticospinal Excitability Modulation During Action Observation
12:33

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Published on: January 1, 2014

Optimizing action separation and integration through moderate practice.

Jens Kürten1, Julia Escher2, Tim Raettig2

  • 1Department of Psychology, University of Würzburg, Röntgenring 11, 97070, Würzburg, Bavaria, Germany. jens.kuerten@uni-wuerzburg.de.

Psychonomic Bulletin & Review
|February 19, 2026
PubMed
Summary
This summary is machine-generated.

Practice improves dual-action performance by enhancing action representation separation and temporal coordination. This reduces initial errors and benefits response times in tasks involving simultaneous eye movements and vocalizations.

Keywords:
Action representationDual-action practiceEye movementsInhibitory controlMultiple action control

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • Coordinating multiple actions often incurs performance costs.
  • Dual-action execution can sometimes be easier than single-action control, especially when inhibitory control is required.

Purpose of the Study:

  • To investigate practice-related effects on dual-action performance.
  • To examine whether increased action coupling or improved action representation separation drives dual-action benefits over time.

Main Methods:

  • Participants performed single or dual actions involving saccadic eye movements and/or vocalizations.
  • Two experiments varied practice duration (6 vs. 12 blocks).
  • Error rates and response times were analyzed to assess performance changes.

Main Results:

  • Initial dual-action execution showed high saccadic co-execution errors and vocal response time benefits.
  • Performance improved significantly over the course of practice.
  • Error rates decreased, and response times became more efficient.

Conclusions:

  • Practice leads to better separation of action representations.
  • Moderate practice optimizes dual-action coordination and performance.
  • Findings suggest practice enhances cognitive control over simultaneous actions.