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RE: Definition of human testability

From: Charles McCathieNevile <charles@w3.org>
Date: Sat, 1 May 2004 13:40:31 -0400 (EDT)
To: Gregg Vanderheiden <gv@trace.wisc.edu>
Cc: w3c-wai-gl@w3.org
Message-ID: <Pine.LNX.4.55.0405011338160.8441@homer.w3.org>

This seems backwards. Presumably we believe that all tests will produce
consistent results when done by reasonably knowledgeable people, with some of
them also being sufficiently simple to automate completely.

Otherwise we have no basis for deciding whether a particular test that a tool
does is in fact a valid one or not, and in the case of two conflicting
results from tools we would not have any way of declaring which was



On Thu, 29 Apr 2004, Gregg Vanderheiden wrote:

>That is what is intended I believe.
>Your alternative wording #1 is closest.   The word "certain" isn't quite
>right since it would apply to all of the non-machine testable items   so it
>would become
>1. In the judgment of the working group members, the success criteria that
>are not machine testable can be tested by humans in a manner that is capable
>of yielding consistent results among multiple knowledgeable testers.
> -- ------------------------------
>Gregg C Vanderheiden Ph.D.
>Professor - Ind. Engr. & BioMed Engr.
>Director - Trace R & D Center
>University of Wisconsin-Madison
>  _____
>From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On Behalf
>Of Sailesh Panchang
>Sent: Thursday, April 29, 2004 11:22 AM
>To: w3c-wai-gl@w3.org
>Subject: Definition of human testability
>    Present draft: "Success criteria for all levels would be testable.
>Some success criteria
>may be machine-testable. Others may require human judgment.
>Success criteria that require human testing would, in the judgment of the
>working group members,  yield consistent results among multiple
>knowledgeable testers."
>Wording of the last sentence is confusing. I believe what is meant is:
>"Judgment of the working group members" applies to identification of
>criteria that can be tested with  consistency  and reliability  by humans.
>Do we intend to list these tests?
>Consider following alternatives:
>1. In the judgment of the working group members, certain success criteria
>can be tested by humans in a manner that is capable of yielding consistent
>results among multiple knowledgeable testers.
>2. Claims of conformance  to success criteria can be based on human testing
>is such testing has yielded or is capable of yielding consistent results
>among multiple knowledgeable testers.
>Sailesh Panchang
>Senior Accessibility Engineer
>Deque Systems,11180  Sunrise Valley Drive,
>4th Floor, Reston VA 20191
>Tel: 703-225-0380 Extension 105
>E-mail: sailesh.panchang@deque.com
>Fax: 703-225-0387
>* Look up <http://www.deque.com> *

Charles McCathieNevile  http://www.w3.org/People/Charles  tel: +61 409 134 136
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Received on Saturday, 1 May 2004 13:40:31 UTC

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