Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Improvement of the Cognitive Perceptual Assessment for Driving (CPAD) based on Usability Test

  • Bae, Jae-Hyuk (Korea National Rehabilitation Research Institute, Department of Clinical Research on Rehabilitation) ;
  • Lee, Jung-Ah (Korea National Rehabilitation Research Institute, Department of Clinical Research on Rehabilitation) ;
  • Choi, Hyun (Korea National Rehabilitation Research Institute, Department of Clinical Research on Rehabilitation) ;
  • Lee, Jae-Jin (Korea National Rehabilitation Research Institute, Department of Clinical Research on Rehabilitation)
  • Received : 2015.06.25
  • Accepted : 2015.07.21
  • Published : 2015.08.31
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Abstract

Objective: The aim of this study was to perform a usability test for CPAD (Cognitive Perceptual Assessment for Driving) and improve it based on the test results. Background: The cognitive perceptual assessment for driving is a computer-based assessment tool to assess the driving capacity of people with brain-damages. It may be a good tool for evaluating the brain-damaged drivers' safe driving capabilities and screening cognitive and perceptual deficits related to driving. We performed a usability test to improve the CPAD based on the result. Method: Both the software consisting of 8 sub-tests (depth perception, sustained attention, divided attention, stroop test, field dependency, digit span, trail making A, trail making B) and the hardware including the input and output devices ( joystick, mouse, keyboard, touch screen) were evaluated through user interviews. Also we identified the problems and issues in using them by observing the participants performing the CPAD tasks. Results: Based on the results, the task instructions were visually and auditorily improved and more practice examples were added to help the users understand the instructions better and increase the input accuracy, a response time window was added and the joystick and touch screen were simplified, which made it easier for the user to perform the CAPD tasks. Conclusion: User discomforts were minimized by improving the task environment, unless it had affected the evaluation criteria. Application: We plan to distribute the improved version of the CPAD to the regional rehabilitation hospitals, and the driving support centers for people with disabilities throughout the country, so it could be used as an evaluation tool for disabled drivers' cognitive and perceptual functions.

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References

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