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Proceedings Article

Learning from others: effects of viewing another person's eye movements while searching for chest nodules

[+] Author Affiliations
Damien Litchfield, Linden J. Ball, Trevor Crawford

Lancaster Univ. (United Kingdom)

Tim Donovan, David J. Manning

Cumbria Univ. (United Kingdom)

Proc. SPIE 6917, Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment, 691715 (March 06, 2008); doi:10.1117/12.768812
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From Conference Volume 6917

  • Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment
  • Berkman Sahiner; David J. Manning
  • San Diego, CA | February 16, 2008

abstract

We report a study that investigated whether experienced and inexperienced radiographers benefit from knowing where another person looked during pulmonary nodule detection. Twenty-four undergraduate radiographers (1 year of experience) and 24 postgraduate radiographers (5+ years of experience) searched 42 chest x-rays for nodules and rated how confident they were in their decisions. Eye movements were also recorded. Performance was compared across three within-participant conditions: (1) free search - where radiographers could identify nodules as normal; (2) image preview - where radiographers were first shown each chest x-ray for 20 seconds before they could then proceed to mark the location of any nodules; and (3) eye movement preview - which was identical to image preview except that the 20 second viewing period displayed an overlay of the real-time eye movements of another radiographer's scanpath for that image. For this preview condition half of each group were shown where a novice radiographer looked, and the other half were shown where an experienced radiologist looked. This was not made known to the participants until after the experiment. Performance was assessed using JAFROC analysis. Both groups of radiographers performed better in the eye movement preview condition compared with the image preview or free search conditions, with inexperienced radiographers improving the most. We discuss our findings in terms of the task-specific information interpreted from eye movement previews, task difficulty across images, and whether it matters if radiographers are previewing the eye movements of an expert or a novice.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Topics

Chest ; Eye ; X-rays
Citation

Damien Litchfield ; Linden J. Ball ; Tim Donovan ; David J. Manning and Trevor Crawford
"Learning from others: effects of viewing another person's eye movements while searching for chest nodules", Proc. SPIE 6917, Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment, 691715 (March 06, 2008); doi:10.1117/12.768812; http://dx.doi.org/10.1117/12.768812


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