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Discriminability measures for predicting readability of text on textured backgroundsSeveral discriminability measures were examined for their ability to predict reading search times for three levels of text contrast and a range of backgrounds (plain, a periodic texture, and four spatial-frequency-filtered textures created from the periodic texture). Search times indicate that these background variations only affect readability when the text contrast is low, and that spatial frequency content of the background affects readability. These results were not well predicted by the single variables of text contrast (Spearman rank correlation = -0.64) and background RMS contrast (0.08), but a global masking index and a spatial-frequency-selective masking index led to better predictions (-0.84 and -0.81, respectively). c2000 Optical Society of America.
Document ID
20040088111
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Scharff, L. F.
(Stephen F. Austin State University, Department of Psychology Nacogdoches, Texas, 75962, United States)
Hill, A. L.
Ahumada, A. J. Jr
Watson, A. B.
Date Acquired
August 21, 2013
Publication Date
February 14, 2000
Publication Information
Publication: Optics express [electronic resource]
Volume: 6
Issue: 4
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NCC2-1095
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Space Human Factors
NASA Center ARC

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