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RE: Criterion

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Sun, 5 Aug 2001 10:03:53 -0500
To: "'GLWAI Guidelines WG \(GL - WAI Guidelines WG\)'" <w3c-wai-gl@w3.org>
Message-ID: <000201c11dbf$d7e5b880$066fa8c0@750>
Correct Jason.

That was the intended plan.    (though you stated the stage two part

The short form of the overall procedure would be

1) To find out where they are adequate.   (including 'or' conditions)

2) To then focus on trying to see which inadequate ones we can fix (make
adequate - complete)

3) To then take those we can't fix (or find criteria for) and identify
the best method for conveying maximum useful information on how to do
the right thing, without misleading as to what is required (false
positive or false negative).

-- ------------------------------
Gregg C Vanderheiden Ph.D.
Professor - Human Factors
Dept of Ind. Engr. - U of Wis.
Director - Trace R & D Center
Gv@trace.wisc.edu <mailto:Gv@trace.wisc.edu>, <http://trace.wisc.edu/>
FAX 608/262-8848 
For a list of our listserves send “lists” to listproc@trace.wisc.edu

-----Original Message-----
From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On
Behalf Of Jason White
Sent: Sunday, August 05, 2001 2:50 AM
To: Charles McCathieNevile
Cc: Gregg Vanderheiden; GLWAI Guidelines WG (GL - WAI Guidelines WG)
Subject: Re: Criterion

I would argue that, while the success criteria for a checkpoint must,
taken as a whole, be both necessary and sufficient to satisfy it,
individual criteria can be offered as alternatives (so long as this is
clearly indicated).

I would argue that effort should be devoted to refining, expanding and
improving success criteria to ensure that they genuinely encapsulate
the necessary and sufficient conditions, instead of hastily dropping
them when an initial analysis indicates that they are inadequate. That
is, we should endeavour to improve the criteria and only drop them in
those cases where it is clear that only examples can meaningfully be
given and that "success criteria", stricto sensu, are unattainable. I
am sure this is the aim of Gregg's investigation of this point.

There are various forms which success criteria can take, for example:

You will have satisfied this checkpoint if you have done a, or b, or
c, or ...

You will have successfully satisfied the checkpoint if you have done
either a and b, or c.

and so forth.
Received on Sunday, 5 August 2001 11:10:41 UTC

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