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Re: Time and Accessibility (RE: was Testing web page accessibility by phone)

From: Charles McCathieNevile <charles@w3.org>
Date: Wed, 29 May 2002 13:57:05 -0400 (EDT)
To: Jon Hanna <jon@spin.ie>
cc: <w3c-wai-ig@w3.org>
Message-ID: <Pine.LNX.4.30.0205291354540.29386-100000@tux.w3.org>

This is a difficult problem. I believe it has been discussed before, because
I was thinking about it at the beginning of last year or end of 2000 and
talked to people about it, but can't find it in archives.

The approximate ideas I had were that with some good user testing, we could
work out a rough guide to the time factor increase. (This is more or less
what the Nielsen Norman group worked on as a basis for their guidelines).

We could then use these to provide some more solid guidance for how we asign



On Wed, 29 May 2002, Jon Hanna wrote:

  By taking an ad absurdum example it's easy to show that time is an
  accessibility issue - would you consider a wheelchair user travelling 20
  miles under his or her own steam to be an equally accessible form of
  transportation to a wheelchair-enabled bus?

  One of the problems with time (and also effort, concentration, and other
  requirements that can increase when one is making use of an accessibility
  feature), is that it is hard to measure in a way that will be valid for all
  users, and hard to decide on clear limits for (how slow does something have
  to be before it really affects accessibility?). This is unsatisfying for
  those of us who attempt to come up with solutions, mainly technical, to
  these problems.

Charles McCathieNevile    http://www.w3.org/People/Charles  phone: +61 409 134 136
W3C Web Accessibility Initiative     http://www.w3.org/WAI  fax: +33 4 92 38 78 22
Location: 21 Mitchell street FOOTSCRAY Vic 3011, Australia
(or W3C INRIA, Route des Lucioles, BP 93, 06902 Sophia Antipolis Cedex, France)
Received on Wednesday, 29 May 2002 13:57:42 UTC

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