Advertisement

Effect of the Color Tablet Computer’s Polarity and Character Size on Legibility

  • Hsuan Lin
  • Wei Lin
  • Wang-Chin Tsai
  • Yune-Yu Cheng
  • Fong-Gong Wu
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8514)

Abstract

This study aimed to explore how different polarities and character sizes on tablet e-readers affect users’ legibility and visual fatigue. Following the experimental method, 30 participants were required to search for the target words in pseudo-texts; meanwhile, the experimental data were connected to an exclusive database through the Internet. Thus, the participants’ search times, accuracy rates, and visual fatigue levels could be analyzed. As indicated by the analytic result, all the four kinds of character size affected search time. Specifically, the 8-pt target words on a 10.1-inch screen had the slowest search speed. As character size increased to 12 pt, search speed became significantly faster. Besides, the interaction between polarity and character size had a significant effect on the accuracy rate of searched target words. This study showed that as a character size increased, polarity produced a higher accuracy rate, and that negative polarity had a more significant effect than positive polarity. Under positive polarity, 8 pt had the lowest accuracy rate, and 10 pt had the next lowest accuracy rate. However, after the character size was increased to 12 pt or above, the accuracy rate was not promoted. Moreover, a larger character size produced a higher accuracy rate. Therefore, 12 pt and 14 pt got the best performance. As for visual fatigue, a small character size was the main factor. The findings of this study can be used in the design of tablet e-readers.

Keywords

tablet computer legibility visual fatigue character size 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Darroch, I., Goodman, J., Brewster, S., Gray, P.: The effect of age and font size on reading text on handheld computers. In: Costabile, M.F., Paternó, F. (eds.) INTERACT 2005. LNCS, vol. 3585, pp. 253–266. Springer, Heidelberg (2005)CrossRefGoogle Scholar
  2. 2.
    Streveler, D.J., Wasserman, A.I.: Quantitative measures of the spatial properties of screen designs. pp. 81–89 (1984)Google Scholar
  3. 3.
    Chan, A., Lee, P.: Effect of display factors on Chinese reading times, comprehension scores and preferences. Behaviour & Information Technology 24(2), 81–91 (2005)CrossRefGoogle Scholar
  4. 4.
    Wang, A.H., Chen, M.T.: Effects of polarity and luminance contrast on visual performance and VDT display quality. International Journal of Industrial Ergonomics 25(4), 415–421 (2000)CrossRefGoogle Scholar
  5. 5.
    Cushman, W.H.: Reading from microfiche, a VDT, and the printed page: subjective fatigue and performance. Human Factors: The Journal of the Human Factors and Ergonomics Society 28(1), 63–73 (1986)Google Scholar
  6. 6.
    Saito, S., Taptagaporn, S., Salvendy, G.: Visual comfort in using different VDT screens. International Journal of Human-Computer Interaction 5(4), 313–323 (1993)CrossRefGoogle Scholar
  7. 7.
    Nishiyama, K.: Ergonomic aspects of the health and safety of VDT work in Japan: A review. Ergonomics 33(6), 659–685 (1990)CrossRefGoogle Scholar
  8. 8.
    Mills, C.B., Weldon, L.J.: Reading text from computer screens. ACM Computing Surveys (CSUR) 19(4), 329–357 (1987)CrossRefGoogle Scholar
  9. 9.
    Shen, I., Shieh, K.K., Chao, C.Y.: Lighting, font style, and polarity on visual performance and visual fatigue with electronic paper displays. Displays 30(2), 53–58 (2009)CrossRefGoogle Scholar
  10. 10.
    Boyarski, D., Neuwirth, C., Forlizzi, J.: A study of fonts designed for screen display. pp. 87-94 (1998)Google Scholar
  11. 11.
    Bernard, M.L., Chaparro, B.S., Mills, M.M.: Examining children’s reading performance and preference for different computer-displayed text. Behaviour & Information Technology 21(2), 87–96 (2002)CrossRefGoogle Scholar
  12. 12.
    Huang, D.L., Patrick Rau, P.L., Liu, Y.: Effects of font size, display resolution and task type on reading Chinese fonts from mobile devices. International Journal of Industrial Ergonomics 39(1), 81–89 (2009)CrossRefGoogle Scholar
  13. 13.
    Cai, D., Chi, C.F., You, M.: The legibility threshold of Chinese characters in three-type styles. International Journal of Industrial Ergonomics 27(1), 9–17 (2001)CrossRefGoogle Scholar
  14. 14.
    Lee, D.S., Shieh, K.K., Jeng, S.C.: Effect of character size and lighting on legibility of electronic papers. Displays 29(1), 10–17 (2008)CrossRefGoogle Scholar
  15. 15.
    Lin, Y.T., Lin, P.H., Hwang, S.L.: Investigation of legibility and visual fatigue for simulated flexible electronic paper under various surface treatments and ambient illumination conditions. Applied Ergonomics 40(5), 922–928 (2009)CrossRefMathSciNetGoogle Scholar
  16. 16.
    Lin, H., Wu, F.G., Cheng, Y.Y.: Legibility and visual fatigue affected by text direction, screen size and character size on color LCD e-reader. Displays (2012)Google Scholar
  17. 17.
    Boschman, M.C., Roufs, J.A.: Text quality metrics for visual display units:: II. An experimental survey. Displays 18(1), 45–64 (1997)CrossRefGoogle Scholar
  18. 18.
    Heuer, H., Hollendiek, G., Kröger, H.: Die Ruhelage der Augen und ihr Einfluß auf Beobachtungsabstand und visuelle Ermüdung bei Bildschirmarbeit. Zeitschrift für Experimentelle und Angewandte Psychologie 36(4), 538–566 (1989)Google Scholar
  19. 19.
    Turville, K.L., Psihogios, J.P., Ulmer, T.R.: The effects of video display terminal height on the operator: a comparison of the 15 and 40 recommendations. Applied Ergonomics 29(4), 239–246 (1998)CrossRefGoogle Scholar
  20. 20.
    Tullis, T.S., Boynton, J.L., Hersh, H.: Readability of fonts in the windows environment. pp. 127-128 (1995)Google Scholar
  21. 21.
    Legge, G.E., Pelli, D.G., Rubin, G.S.: Psychophysics of reading—I. Normal vision. Vision Research 25(2), 239–252 (1985)CrossRefGoogle Scholar
  22. 22.
    Dyson, M.C., Haselgrove, M.: The influence of reading speed and line length on the effectiveness of reading from screen. International Journal of Human-Computer Studies 54(4), 585–612 (2001)CrossRefGoogle Scholar
  23. 23.
    Bauer, D., Cavonius, C.: Improving the legibility of visual display units through contrast reversal. Ergonomic aspects of visual display terminals, pp. 137–142. Taylor and Francis, London (1980)Google Scholar
  24. 24.
    Bernard, M.L., Chaparro, B.S., Mills, M.M.: Comparing the effects of text size and format on the readibility of computer-displayed Times New Roman and Arial text. International Journal of Human-Computer Studies 59(6), 823–835 (2003)CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Hsuan Lin
    • 1
  • Wei Lin
    • 2
  • Wang-Chin Tsai
    • 3
  • Yune-Yu Cheng
    • 4
  • Fong-Gong Wu
    • 4
  1. 1.Department of Product DesignTainan University of TechnologyTainanTaiwan
  2. 2.Department of Interior DesignHwa Hsia Institute of TechnologyTaipeiTaiwan
  3. 3.Department of Product and Meida DesignFo Guang UniversityYilanTaiwan
  4. 4.Department of Industrial DesignNational Cheng Kung UniversityTainanTaiwan

Personalised recommendations