Flickering images can cause problems for
those with seizure disorders. What is not
often considered is that people for whom
English is a second language often have
trouble reading flashing or scrolling text in
images.
WAI Section 508
the X in the red cell
means the image has
failed WAI. The yellow
caution sign means
that it is questionable
if the image would pass
Section 508 standards.
The Gif Flicker test is important because flickering or moving images like scrolling text can cause seizures in those with such disorders. But it is really more than that. Many users for whom English is a second language or those who are dyslexic have a real problem with scrolling or shimmering text.
This slide shows the legend or meaning of the different colors and icon symbols assigned to images that move. Generally speaking, if the image has a reb background with an x in it, the image fails the test for the image. The yellow background with the caution symbol means that the image is questionable. The thing to remember is that if there is not a good educational reason for using the animated image, it is best to avoid using them at all.