Image ALT Attributes
Images need to have what is commonly known as an 'alt-tag' or text alternative so that a screen reader user can hear about the image - some screen readers will just read the file name or some say 'image' if the attribute is omitted. (W3C WCAG 2.0 1.1).
Testing Techniques
These techniques may be used to perform the test.
Method
Quick Overview: Web developer toolbar and WAVE toolbar Errors, Features and Alerts. Check whether alt-tags make sense using Thunder or NVDA screen reader.
Criteria for this Test
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None, detrimental to understanding of content. No option to add alt-tag if uploading image to web pages. |
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Inadequate/sparse alternative text even to actual website images not just those added by users. |
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Alternative text offered but lacks brevity or clarity e.g. image of duck. |
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Acceptable alternative text throughout. |
