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Re: summarization information delivery options: attribute or element

From: Laura Carlson <laura.lee.carlson@gmail.com>
Date: Sat, 27 Feb 2010 05:00:13 -0600
Message-ID: <1c8dbcaa1002270300r2166ab75qd4d29a28719d1c75@mail.gmail.com>
To: Gez Lemon <g.lemon@webprofession.com>
Cc: John Foliot <jfoliot@stanford.edu>, public-html-a11y@w3.org
Hi Gez,

> You want to provide information for people with cognitive disabilities
> and hide it from them? The proposal also mentions only revealing the
> button on focus or mouseover, which will introduce discoverability
> problems for everyone.

Yes. A hidden button that's revealed on focus (and mouseover) fails
basic usability principles, such as the gulf of execution and
evaluation.  [1] [2].

Sighted people who use a mouse won't click on a button if they don't
know is there.

People tabbing through content are usually focused on an outcome.
These users do not typically wait after each tab press to discover
what happens as they tab their way through the content.

Best Regards,
Laura

[1] Norman, Donald. New Perspectives on Human-computer Interaction,
CRC Press, 1986.
[2] Norman, Donald. The Design of Everyday Things. New York: Basic Book, 1988.

-- 
Laura L. Carlson
Received on Saturday, 27 February 2010 11:00:42 GMT

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