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What graphics to prepare into tactile form and what not to prepare?
What graphics to prepare into tactile form and what not to prepare?
The following aspect must always be taken into account:
role of the graphics (see chapter Types of graphics),
substitutability by text/tables (see below)
technologies available to those who will prepare the graphics (choice between 2D, 2,5 D and 3D, see chapter Technologies available)
time possibilities
the specifics of tactile perception (see below) and the skills of the users (e.g. experience with a certain technology)
Conclusion
Conclusion
In most cases, for the study materials, tactile graphics for items 3 (structured information) and 4 (informative graphics), and rarely 5 (graphics with social role) are prepared.
Graphics replacement options
Graphics replacement options
Just to give a few examples very briefly. There are many more possibilities and they will be added over time.
Tables
Tables
Pie chart (original)
Pie chart (original)
Table (adaptation)
Table (adaptation)
The pie chart could certainly be left as a tactile graphic, but exploring it and reading information would be too slow. Therefore, a suitable adaptation is to convert the exact data into tabular form.
Text
Text
Map as an illustration (original)
Map as an illustration (original)
Map of the Siberian tiger living area
Text (adaptation)
Text (adaptation)
Specifics of tactile perception
Specifics of tactile perception
Compared to visual perception...
...tactile perception:
is much slower — requires direct contact and an active approach or exploration
is limited in the size of the perceived object
is limited in the detail of the display
does not allow to reliably display a 3D object in plane
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