[accessibleimage] testing of tactile picture reading abilities

Hi,

I was wondering if anyone tests or knows of tests  to determine a blind reader's abiltiy to understand / read / interpret tactile graphics?

The reason I am asking this is
1. if  a blind reader is given a tactile to read and one does not know the level of his/her abilities it can be frustrating (because too easy or difficult) for that person.
2. If a blind reader is testing a  tactile graphic out, with the aim of seeing if the tactile is an understandable graphic, and does not have experience with tactile graphics the testing of the graphic might  not return a correct result. That is the graphic might be suitable for a more experienced user while too difficult for the one testing it.

It is often assume that just because someone is blind and given a tactile that they will understand it.  It seems to be forgotten that it takes time for both sighted and blind
persons to understand and interpret information graphics. Interpreting pictures, diagrams, maps etc for both sighted and visually impaired requires exposure and
experience. Pictures are a type of language that also must be learned - either passivly or activly.

And then there are the cultural differences of pictures - how is this taken into consideration?


So my question is if anyone knows of tests etc  to find out at which level or abiltiy a blind reader is at concerning tactile graphics?

Thanks,

Lisa

Lisa Yayla
Huseby Kompetansesenter
Oslo Norway

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