A STUDY OF THE RELATIONSHIP BETWEEN PHOTOPIC AND SCOTOPIC VISUAL ACUITY
THE HYPOTHESIS TESTED IN THIS STUDY WAS THAT THERE IS NO RELATIONSHIP BETWEEN PHOTOPIC AND SCOTOPIC VISUAL ACUITY. SELECTED PHOTOPIC VISUAL-ACUITY CHARTS WERE ADMINISTERED TO 202 SUBJECTS. THE SUBJECTS WERE ALSO TESTED WITH THE ARMY NIGHT-VISION TESTER-R2X. INTERCORRELATIONS OF ALL MEASURES WERE COMPUTED USING PEARSON PROJECT MOMENT CORRELATION TECHNIQUES. CORRELATIONS WERE COMPUTED BETWEEN THE PHOTOPIC AND SCOTOPIC TESTS, CORRECTING FOR ATTENUATION IN THE PHOTOPIC VARIABLES BY UTILIZING RELIABILITY DATA FROM PREVIOUS STUDIES. A DERIVED BRIGHTNESS-DISCRIMINATION SCORE WAS ALSO COMPUTED. IT IS CONCLUDED THAT THERE IS A POSITIVE CORRELATION BETWEEN THE MEASURES OF PHOTOPIC AND SCOTOPIC VISUAL ACUITY UNDER CONDITIONS OF THIS STUDY. DATA OBTAINED INDICATE THAT FURTHER RESEARCH MAY PROVIDE A MEANS OF IDENTIFYING, BY USE OF PHOTOPIC WALL-CHARTS, A PORTION OF A GIVEN POPULATION WHOSE NIGHT-VISION SCORE WOULD TEND TO BE CONSIDERABLY ABOVE THE MEANS OF THE TOTAL POPULATION.
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Supplemental Notes:
- No 43, pp 17-31, 5 FIG, 7 TAB, 12 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Uhlaner, J E
- Woods, Irving A
- Publication Date: 1951
Media Info
- Media Type: Print
- Pagination: pp 17-31
- Monograph Title: Studies in night visibility
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Serial:
- Highway Research Board Bulletin
- Issue Number: 43
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Brightness; Night visibility; Testing; Vision; Visual perception
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00222865
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Apr 28 1994 12:00AM