Accessibility Testing

It is a subset of Usability Testing.It ensures that the application under test is usable by people  who are having disabilities like motion impairments,color blindness and other old age problems.

It is also referred to as "Testing for Disabled".

The different types of disabilities can be :

1.Motion Impairments:It may be difficult for some people to use the keyboard or mouse due to critical disease or an injury.

2.Hearing Impairments:A person who is partially deaf can have problems hearing specific frequency volume.

3.Visual Impairments:A person having cataract problem,color blindness,blur vision  can have a visual limitation.Also the person can suffer from short or far sightedness can face problem in locating mouse pointer or finding the pixels.

List of different Web Accessibility Tools:

1.InFocus.
2.AccVerify.
3.WebXM.