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Design Of Digits

Report Number: WADC TR 54-262
Author: Crook, Mason N.
Author: Baxter, Frances Schulze
Corporate Author: Tufts College, Institute For Applied Experimental Psychology
Laboratory: Aero Medical Laboratory
Date of Publication: 1954-06
Pages: 69
PB Number: PB116521
AD Number: AD0050080

Design characteristics of transilluminated numerals in the Air Force-Navy Aeronautical style at very low brightness were investigated. The experimental results indicate narrow stroke widths and close spacing were unfavorable. With area held constant, the effect of height/width ratio varied from digit to digit. Configurational characteristics could not be readily improved, but a round tipped "3" in an open style was found to be superior to the standard flat-topped design. Data on confusions among both intact digits and digits with small stroke defects showed reasonable degrees of consistency. A number of special observations for which the test situation was well suited threw light on problems of experimental technique. From an analysis of the literature it was concluded that most of the contradictions on digits by different investigators can be resolved and the data fitted into a coherent pattern. This report is of value to the Air Force in that the principles given can be used as guide lines for charts and checklist designs to give better readability.

Hunt Library, Embry-Riddle Aeronautical University
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This report has been indexed in U.S. Government Research Reports, vol. 23, no. 4, p.143, 4/15/1955
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