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The development and validation of a short-duration sustained visual search task for process control environments.

Daniel Sturman1, Mark W Wiggins1, William S Helton2

  • 1Macquarie University, NSW, Australia.

Applied Ergonomics
|November 9, 2020
PubMed
Summary

A new visual search task effectively assesses sustained attention in simulated power control settings. This validated method offers a shorter alternative for evaluating operator vigilance and performance over time.

Keywords:
Power controlProcess controlRail controlVigilance

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Area of Science:

  • Human Factors
  • Cognitive Psychology
  • Industrial Engineering

Background:

  • Sustained attention is critical for process control operators.
  • Assessing sustained attention often requires lengthy tasks.
  • A validated short-duration task is needed for experimental efficiency.

Purpose of the Study:

  • To validate a short-duration sustained visual search task.
  • To assess its utility for evaluating sustained attention in process control.
  • To compare its effectiveness with longer tasks.

Main Methods:

  • Developed a 10-scenario dynamic visual search task.
  • Participants (N=121) monitored simulated power transmission interfaces.
  • Identified system faults and response times were recorded.

Main Results:

  • Demonstrated a vigilance decrement (increased latency, decreased accuracy) over time.
  • Task performance correlated with longer, established sustained attention tasks.
  • The short task showed significant changes in response latency.

Conclusions:

  • The short-duration sustained visual search task is a valid assessment tool.
  • It serves as a viable alternative to longer process control tasks.
  • It is valuable for assessing operator sustained attention capacity.