EDSE/EDIT 526: Web Accessibility and Design
Topic 5: Web Accessibility and Universal Design
Introduction
For those of you who have been wondering if we were ever going to get to the
details of web accessibility in this course named "Web Accessibility and Design,"
the wait is over. This is the week that we'll discuss this topic in some
detail. This topic entails quite a bit of reading, so don't delay it too long. I would be interestedand in hearing your reactions and insights in the discussion forum. Most of the reading
is in the CD-ROM that you should have already purchased. If you haven't purchased
it yet, go to the WebAIM web site and purchase it, using the discount code
you received earlier.
Part 1: Read about Web Accessibility
Read the following from the WebAIM Guide to Web Accessibility CD-ROM:
- Chapter 1: The Principles of Web Accessibility
(Note: You already read the "Introduction to Web
Accessibility"
from this chapter so you don't have to read that part again.)
- Chapter 2: Visual Disabilities
- Chapter 3: Motor Disabilities
- Chapter 4: Auditory Disabilities
- Chapter 5: Cognitive Disabilities
- Chapter 6: Seizure Disorders
- Chapter 7: Design Considerations
- Chapter 8: The Web Accessibility Initiative
- Chapter 9: United States Laws
- Chapter 29: Accessibility Tools (just "Using WAVE" and "Using
Cynthia Says"; you can read more, but you are not required to for
this assignment)
(Note: the chapters are relatively short, but all together
this is a fair amount of reading, so it would be a good idea to start
early)
Part 2: Experience a Screen
Reader
This is your chance to "see" the web as a blind person sees
it. This will help you understand things from the perspective of people
with disabilities.
Note: We experimented with a screen reader briefly in class, so some of you have already had exposure to the general concept, but I encourage you to experiment some more and get a better feel for the way that screen readers work.
Choose from the following screen readers (available only for Windowsnote):
- IBM Home
Page Reader
- This is a 30-day trial
version, unless you pay for the software.
- This is the least expensive of all screen readers for the web.
- This program can access the web, but not other aspects of the computer,
so it's not the most popular program among blind users, because
they like to use just one screen reader, rather than have to
switch between a screen reader for Windows and a screen reader
just for the web.
- The trial version can only access certain pre-determined web sites (you
won't be able to surf the web with it or test your web site with it unless
you buy it).
- This is the easiest for visual users to learn; it's more user-friendly
than the others. In fact, for this reason I highly recommend
that developers use this screen reader for testing purposes,
but you (or your employer) would have to purchase it. See the article
about using Home Page Reader for testing purposes.
- A list of keyboard shortcuts is available in the Appendix of your CD-ROM
- When you install it it will probably change your home page. You can change
it back later.
- JAWS
- This is the most popular screen reader among blind users.
- You can access any web site with the trial
version.
- It can be difficult to use this program the first time.
- There is no interface,
really. It's all in the background, so you have to learn the
keyboard shortcuts. The CD-ROM appendix contains a list of JAWS
keyboard shortcuts.
- The trial version lasts almost indefinitely (many months), but for only
40 minutes at a time. If you want to continue using JAWS you
have to reboot your computer (yes, reboot your computer, not just
restart the program). This system allows developers to use JAWS for testing
purposes, but makes it impractical for blind users to use the
trial version, because nobody likes to reboot their computer
every 40 minutes.
- This is expensive software, in the neighborhood of $1000.
- Window Eyes
- This is the second-most popular screen reader among blind users.
- Like JAWS:
- You can access any web site with the trial
version.
- There is no interface, really. It's all in the background, so you have
to learn the keyboard shortcuts. (Note: Unfortunately,
the CD-ROM appendix does not contain a list of Window
Eyes keyboard shortcuts, but the GW Micro web site has
Window
Eyes tutorials).
- The trial version lasts almost indefinitely (many months), but for only
40 minutes at a time. If you want to continue using Window
Eyes you have to reboot your computer (yes, reboot your computer,
not just restart the program). This system allows developers
to use Window Eyes for testing purposes, but makes it
impractical for blind users to use the trial version,
because nobody likes to reboot their computer every 40 minutes.
- This is expensive software, in the neighborhood of $800.
You can try just one of the screen
readers if you like, but I encourage you to try a couple of them. They work
differently and have different options available to users. It's worth it
to experience the differences between the technologies.
Note: Although
the Macintosh OSX operating system comes with a built-in screen reader of
sorts, it is not sophisticated enough at this point to substitute for any
of the Windows-based screen readers. You will need to use a Windows-based
computer for this assignment. If you do not have a Windows-based computer
yourself, see if you can use the computer of a friend or colleague, or use
the computer labs (see note below)
Another Note: If you don't want to use your own computer,
or can't use it for whatever reason, or don't have access to a computer
at home, you can use the Commerce I computer lab (available Saturdays
from noon until 5:00) or the Assistive Technology Lab (Thompson Hall
221, 703-993-3589, see the lab
schedule).
When you use a screen reader
for the first time you may be overwhelmed by the experience. You may
have a hard time trying to figure out how to use the screen reader and
get discouraged quickly. You may begin to think that everything on the web is
inaccessible to screen readers, because it seems so hard for you to use! It
will take some time and patience on your part to learn to use a screen reader.
I don't expect you to become screen reader user experts with this assignment
alone. It often takes users months to get used to the software.
The most important keyboard shortcut to learn is how
to make the reader stop reading: this is the control key. The shortcut
to make it start reading again varies between screen readers (see the
appendix of the CD-ROM for keyboard shortcuts). Using the screen reader
and your keyboard, practice navigating from link to link with the tab
key. Use shift + tab to go backwards through links. Use the enter key
to click on links. Use the keyboard shortcuts (which are different for every
screen reader) to navigate from heading to heading, or to get a list of links,
or to enter into table navigation mode and navigate from cell to cell within
tables. Get to to know some of the features of screen readers.
As you use the screen readers, consider these questions:
- How is the screen reader experience different from the visual experience?
- Can screen reader users get a sense of the entirety of the page in the same
way that visual users can by scanning the page with their eyes?
- If you used a screen reader on a daily basis, what would you want web developers
to keep in mind?
Part 3: Watch a News Video Clip
Go to a news web site such as www.cnn.com, www.msnbc.com, www.abcnews.com,
www.foxnews.com, etc. and watch a news video clip, but watch it with the
sound turned off.
Consider these questions:
- Did the video have captions?
- Could you get the same
content some other way, such as through the text on the web page?
- How
accessible is this information to somebody who is deaf?
Part 4: Evaluate a Page's Accessibility
Using WAVE and Cynthia Says
Go to few web sites, such as www.amazon.com or
any of the news sites previously mentioned, or the site of the place where
you work. Evaluate the sites using WAVE and
Cynthia Says.
Consider these questions:
- Do
the web sites "pass" these evaluation tools?
- How does the feedback differ between WAVE and Cynthia
Says?
- If a web page passes these evaluation tools, does that always mean that
the page is accessible?
- What kinds of things are these tools unable to check for?
Part 5: Discuss your experience in the
Blackboard discussion forum
Go to the Blackboard discussion forum and post some observations about these
topics. Please also read the responses of others, and respond
to them as
appropriate. This may mean that you visit
the discussion forum more than once during the week (hint, hint!).