Four major display variables, luminance adaptation level, symbol contrast ratio, symbol visual size and off-axis viewing angle, were related, in a rotatable central composite design, to an observer's ability to identify symbols shown on a large screen display (LSD). The results show the nature and significance of all main effects as well as delineate the important interactions among these variables. The results can be used as an LSD design and evaluation tool permitting tradeoffs to be made among the important features of display equipment, projection screens and viewing facilities.
Get full access to this article
View all access options for this article.
References
1.
CrookM.N., HansonJ.A., & WeiszA., Legibility of Type as Determined by the Combined Effect of Typographical Variables and Reflectance of Background, WADC Tech. Rpt. 53-441, March 1954.
2.
HowellW.C., & KraftC.L., Size, Blur and Contrast as Variables Affecting the Legibility of Alpha-Numeric Symbols on Radar-Type Displays, WADC Tech. Rpt. 59-536, Sept 1959.
3.
ReinwaldF.L., Legibility of Symbols of the AND 10400, Mackworth and Berger Type Faces at Vertical and Horizontal Angles of Presentation, RADC Contract AF30(602) -212, undated.
4.
ShurtleffD.A., How to Make Displays Legible, Human Interface Design, Whittier, CA, 1980
5.
ShurtleffD.A., & WuerschW.F., Legibility Criteria in Design and Selection of Data Displays for Group Viewing, Proc. Human Factors Society, Nov. 1979.
6.
Van CottH.P., & KinkadeR.G.Human Engineering Guide to Equipment Design, Joint Army-Navy-Air Force Steering Committee, Washington, DC, 1972.
