Effectiveness of Using Local Cues to Indicate Perspective in Tactile Diagrams for People with Visual Impairments
Introduction This study presents and evaluates the use of a method using local cues to indicate perspective in tactile diagrams as compared to the current use of visual perspective methods. Methods Perspective for an object using local cues is represented with standard visual perspective lines but w...
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Published in | Journal of visual impairment & blindness Vol. 112; no. 6; pp. 731 - 744 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Los Angeles, CA
SAGE Publications
01.11.2018
Sage Publications, Inc SAGE PUBLICATIONS, INC |
Subjects | |
Online Access | Get full text |
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Summary: | Introduction
This study presents and evaluates the use of a method using local cues to
indicate perspective in tactile diagrams as compared to the current use of
visual perspective methods.
Methods
Perspective for an object using local cues is represented with standard
visual perspective lines but with the thickness of the lines varying as a
function of depth away from the viewer. Performance of visually impaired
study participants (that is, those who are blind or have low vision), using
the new method and the standard visual perspective method, were compared as
functions of: onset of vision loss of a participant, perspective method
used, repetition, and object and perspective of an object presented.
Results
For the main task, the method used—Wald χ2(1, 585) = 7.147, p =
0.008—and the method-repetition interaction—Wald χ2(1, 585) =
4.272, p = 0.039—had significant effects. Participants performed better with
our new method and there was a significant improvement for (only) this
method between repetitions.
Discussion
The findings demonstrate that our new method improved the performance of
users for tasks involving perspective on diagrams over the standard visual
perspective method. The data also indicates that with more repetition,
improvement could become even greater than observed during this study.
Implications for practitioners
Perspective frequently plays a critical role in aiding the understanding of
questions in mathematics and science. Adding local cues to a standard
perspective diagram shows promise in improving users' ability to interpret
objects. |
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ISSN: | 0145-482X 1559-1476 |
DOI: | 10.1177/0145482X1811200608 |