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Cognitive load in distributed and massed practice in virtual reality mastoidectomy simulation.

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Distributed practice in virtual reality mastoidectomy training significantly reduced cognitive load (CL) compared to massed practice. This suggests spaced learning optimizes technical skills acquisition and memory consolidation.

Keywords:
Cognitive loaddistributed practicemassed practicemastoidectomy trainingtechnical skills trainingvirtual reality simulation

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Area of Science:

  • Medical Education
  • Surgical Simulation
  • Cognitive Psychology

Background:

  • Cognitive load theory posits limited working memory capacity, impacting learning.
  • Reducing cognitive load (CL) is crucial for effective skills acquisition.
  • Virtual reality (VR) simulations offer a platform for surgical training.

Purpose of the Study:

  • To investigate the impact of repeated practice and simulator-integrated tutoring on cognitive load during VR mastoidectomy simulation.
  • To compare the effects of distributed versus massed practice on CL in surgical training.
  • To assess the efficacy of a simulator-integrated tutor in managing CL.

Main Methods:

  • A prospective trial involving 40 novice medical students performing 12 VR mastoidectomy procedures.
  • Participants were randomized into distributed practice (spaced over time) or massed practice (in one day) groups.
  • Cognitive load was measured via reaction time in a secondary task; data analyzed using linear mixed models.

Main Results:

  • The VR mastoidectomy procedure imposed significant cognitive demands, indicated by increased reaction times.
  • Distributed practice led to a significant reduction in CL, whereas massed practice did not.
  • The simulator-integrated tutor function did not significantly affect CL.

Conclusions:

  • Distributed practice is more effective than massed practice in reducing cognitive load during repeated VR mastoidectomy training.
  • Findings suggest that skills and memory consolidation benefit from spaced learning.
  • Optimizing technical skills acquisition requires structuring training as time-distributed practice.