Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Identification of the Minimum Legible Text Size for Group-View Display of the Main Control Room in Radioactive Waste Facility

  • Jung, Kihyo (University of Ulsan, School of Industrial Engineering) ;
  • Lee, Baekhee (Hyundai Motor, Body and Trim Development Team) ;
  • Chang, Yoon (LG Electronics, Culture and Lifestyle Research Team) ;
  • Jung, Ilho (Hyundai Engineering Co., Control and Instrument Department) ;
  • You, Heecheon (POSTECH, Department of Industrial and Management Engineering)
  • Received : 2017.04.04
  • Accepted : 2017.06.09
  • Published : 2017.06.30
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Abstract

Objective: The present study identified the minimum legible text size by an experiment for eight combinations of background and text colors, which will be used in designing visual information on group-view display (GVD). Background: Information on minimum legible text size is needed to design the visual information presented on GVD in a radioactive waste control room. Method: The experiment was conducted for 22 male participants (age: mean = 37, SD = 6.7; visual acuity: over 0.8) who were recruited by considering demographic characteristics of current control room operators. Eight combinations of background and text colors were considered and the minimum legible text size was determined for each combination by applying the method of limits, one of psychophysical methods. Results: The minimum legible text size was significantly different in accordance with the combination of background and text colors. Statistical analysis results showed that luminance contrast and color contrast between background and text influenced the minimum legible text sizes. Conclusion: This study concluded that the minimum legible text size is 8 minute of arc for various combinations of background and text colors. Application: The minimum legible text size identified in the present study can be utilized in designing visual information on GVD at the main control room in a radioactive waste facility.

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References

  1. Bernard, M.L., Chaparro, B.S., Mills, M.M. and Halcomb, C.G., Comparing the effects of text size and format on the readability of computer-displayed Times New Roman and Arial text. International Journal of Human-Computer Studies, 59, 823-835, 2003. https://doi.org/10.1016/S1071-5819(03)00121-6
  2. Carvalho, P.V.R., Santos, I.L., Gomes, J.O., Borges, M.R.S. and Guerlain, S., Human factors approach for evaluation and redesign of human-system interfaces of a nuclear power plant simulator. Displays, 29(3), 273-284, 2008. https://doi.org/10.1016/j.displa.2007.08.010
  3. Corcoran, W.R., Finnicum, D.J., Hubbard, F.R.III., Musick, C.R. and Walzer, P.F., Nuclear power-plant safety functions. Journal of Nuclear Safety, 22(2), 179-190, 1981.
  4. Fechner, G.T., Elemente der Psychophysick. Vision Research, 9, 1111-1130, 1860.
  5. Juicystudio, Color brightness. Retrieved January 27, 2013 from http://juicystudio.com/services/aertcolourcontrast.php#brightformula.
  6. Kong, Y.K., Lee, I., Jung, M.C. and Song, Y.W., The effects of age, viewing distance, display type, font type, colour contrast and number of syllables on the legibility of Korean characters. Ergonomics, 54(5), 453-465, 2011. https://doi.org/10.1080/00140139.2011.568635
  7. Lee, B., Chang, Y., Jung, K., Jung, I. and You, H., Ergonomic evaluation of a control room design of radioactive waste facility using digital human simulation. Journal of the Ergonomics Society of Korea, 29(3), 383-391, 2010. https://doi.org/10.5143/JESK.2010.29.3.383
  8. Lee, S.J. and Seong, P.H., Experimental investigation into the effects of decision support systems on operator performance. Journal of Nuclear Science and Technology, 46(12), 1178-1187, 2009. https://doi.org/10.1080/18811248.2009.9711631
  9. Legge, G.E., Parish, D.H. Luebker, A. and Wern, L.H., Psychophysics of reading. XI. Comparing color contrast and luminance contrast. Journal of Optical Society of America A, 7(10), 2002-2010, 1990. https://doi.org/10.1364/JOSAA.7.002002
  10. Myung, R., Conjoint analysis as a new methodology for Korean typography guideline in Web environment. International Journal of Industrial Ergonomics, 32, 341-348, 2003. https://doi.org/10.1016/S0169-8141(03)00074-X
  11. O'Hara, J.M., Brown, W.S., Lewis, P.M. and Persensky, J.J., Human-System Interface Design Review Guidelines (DC 20555-0001). U.S. Nuclear Regulatory Commission, Office of Nuclear Regulatory Research, 2002.
  12. Shieh, K.K. and Lin, C.C., Effects of screen type, ambient illumination, and color combination on VDT visual performance and subjective preference. International Journal of Industrial Ergonomics, 26, 527-536, 2000. https://doi.org/10.1016/S0169-8141(00)00025-1
  13. W3, Luminance contrast. Retrieved January 27, 2013 from http://www.w3.org/TR/WCAG20/#contrast-ratiodef.
  14. Yamamori, T., Ichikawa, T., Kawaguchi, S. and Honma, H., Recent technologies in nuclear power plant supervisory and control systems. Hitachi Hyoron, 49(2), 165-168, 2000.