2 · Image ALT Attributes and Text Alternative
Web 2.0 Services
Images need to have what is commonly known as an 'alt-tag' or text alternative, so that a screen reader user can hear an image description. Some screen readers will read the file name or some say 'image' if the attribute is omitted. The alt-tag should be appropriate for the content and succinct. Text should be accessible to text-to-speech tools and screen-readers so that it is read aloud accurately and intelligibly.
This test has 5 possible outcomes.
|0%||None, detrimental to understanding of content. No option to add alt-tag if uploading image to web pages. Lack of use of null alt attributes (e.g., alt="").|
|33%||Inadequate/sparse alternative text even to actual website images not just those added by users. Inappropriate use of null alt attributes (e.g., alt="").|
|67%||Alternative text offered but examples lack brevity or clarity e.g. image of duck.|
|100%||Acceptable alternative text throughout and use of empty or null alt attributes (e.g., alt="") that AT can ignore.|
The results of this test are taken into account when calculating accessibility scores for the following disabilities.