STUDIES OF DISPLAY SYMBOL LEGIBILITY: 21. THE RELATIVE LEGIBILITY OF SYMBOLS FORMED FROM MATRICES OF DOTS

Abstract

The purpose of the study was to determine the legibility of symbols formed from matrices which contained different numbers of dot elements. A set of alphanumeric symbols was constructed from each of the following dot matrices: 3 x 5, 5 x 7, 7 x 11, and 9 x 15. The four symbol sets were shown for identification to one group of operators under nearly optimal viewing conditions and to a second group under degraded viewing conditions. Both rate and accuracy of identification were recorded. The results indicate that the 5 x 7 symbols are as legible as 7 x 11 and 9 x 15 symbols for most of the conditions studied, but in one condition the 7 x 11 was more legible than the 5 x 7.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
AD0702491

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  • Donald A. Shurtleff

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  • MITRE Corporation

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