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Reducing clinicians' cognitive workload by system redesign; a pre-post think aloud usability study.

L W P Peute1, N F De Keizer, E P A Van Der Zwan

  • 1Department of Medical Informatics, Academic Medical Center - University of Amsterdam, The Netherlands.

Studies in Health Technology and Informatics
|September 7, 2011
PubMed
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Redesigning a web-based Data Query Tool reduced physicians' cognitive workload. Think Aloud usability testing identified key issues in action planning, improving health information system design and usability.

Area of Science:

  • Health Informatics
  • Human-Computer Interaction
  • Cognitive Psychology

Background:

  • Interactive Health Information systems present significant cognitive complexity.
  • High cognitive burden and workload are common user experiences.

Purpose of the Study:

  • To evaluate Think Aloud usability testing for redesigning a web-based Data Query Tool.
  • To reduce cognitive workload for physicians interacting with the system.

Main Methods:

  • Pre and post redesign usability testing was conducted.
  • The User Action Framework was used to classify usability problems.

Main Results:

  • A significant reduction in cognitive task workload was observed post-redesign.

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  • Usability issues in cognitive action planning most impacted cognitive workload.

    • Conclusions:

    • Think Aloud usability testing effectively informs health information system redesign.
    • Addressing cognitive complexity in system design improves usability and reduces physician workload.