Hello. I am about to begin designing a usability study on a government website and evaluating the accessability of the site will be a big component. I'm looking for advice on comparing data from the visually disabled participants (using screen readers and magnifieers) to participants with typical vision.
1. Is there an expected relationship between typical participants and the visually disabled (ie, is it possible to say that "if the disabled participants have time-on-task within 35% of non-disabled participants the task is considered to not have accessability problems"?) If so, what should be the percentage difference? 2. Should I create test tasks as I would normally and then adapt them as necessary for the disabled or should I have some or all of the tasks specifically designed for the disabled? 3. Are there any common problems with installation and settings with JAWS, Dragon Reader, and Zoomtext (the software we'll be using) I have limited experience with them and while I plan to working with them. I plan to spend a lot time with them in preparation for the test but making sure I have the test environment propperly setup is a worry that I'd like to remove. ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... [email protected] Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
