Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Effects of Illumination and Target Size on Time-To-Detect while Recovering Dark Adaptation

암순응 환경에서 조도수준과 표적크기가 탐지시간에 미치는 영향

  • Park, Jae-Kyu (Human Factors Team, GNP System Co., Ltd.) ;
  • Park, Sung-Ha (Department of Industrial & Management Engineering, Hannam University) ;
  • Oh, Hyun-Seung (Department of Industrial & Management Engineering, Hannam University)
  • 박재규 ((주)지엔피시스템 인간공학팀) ;
  • 박성하 (한남대학교 산업경영공학과) ;
  • 오현승 (한남대학교 산업경영공학과)
  • Published : 2009.11.30
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Abstract

Effects of dark adaptation have large safety implications. This study was aimed to investigate the effects of varying illuminance and the size of critical detail on visual performance (i.e., time-to-detect) in a dark room environment. While adapting to the dark environment, ten subjects were asked to detect and answer simple numerical expressions under 9 experimental conditions (3 illuminance level $\times$ 3 target size). The ANOVA results revealed that the time-to-detect was significantly affected by both of the illumination level and the size of critical detail. As illumination increased from 10 lux to 20 lux, the time-to-detect was significantly declined. For the size of critical detail, 0.5/min size (i.e., equal to 2 minutes of visual angle) resulted in a shorter time-to-detect, as compared to 0.7/min size (i.e., equal to 1.6 minutes of visual angle). Potential applications of this research include the development of design guidelines for illumination and warning signs in poorly illuminated viewing environments.

Keywords

References

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