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RE: some initial questions from the previous thread

From: Vivienne CONWAY <v.conway@ecu.edu.au>
Date: Tue, 23 Aug 2011 20:28:40 +0800
To: Shadi Abou-Zahra <shadi@w3.org>, Eval TF <public-wai-evaltf@w3.org>
Message-ID: <8AFA77741B11DB47B24131F1E38227A98C87BF450A@XCHG-MS1.ads.ecu.edu.au>
HI all
Just thought I'd weigh in on this one as I'm currently puzzling over the issue of how to score websites.  I'm just about to start a research project where I'll have over 100 websites assessed monthly over a period of 2 + years.  I need to come up with a scoring method (preferably a percentage) due to the need to compare a website within those of its own classification (e.g. federal government, corporate, etc), and compare the different classifications.  I am thinking of a method where the website gets a percentage score for each of the POUR principles, and then an overall score.  What I'm strugling with is what scoring method to use and how to put different weights upon different aspects and at different levels.  I'll be assessing to WCAG 2.0 AA (as that's the Australian standard).  All input and suggestions are gratefully accepted and may also be useful to our discussions here as it's a real-life situation for me.  It also relates to may of the questions raised in this thread by Shadi.  Looking forward to some interesting discussion.


Vivienne L. Conway
From: public-wai-evaltf-request@w3.org [public-wai-evaltf-request@w3.org] On Behalf Of Shadi Abou-Zahra [shadi@w3.org]
Sent: Monday, 22 August 2011 7:34 PM
To: Eval TF
Subject: some initial questions from the previous thread

Dear Eval TF,

 From the recent thread on the construction of WCAG 2.0 Techniques, here
are some questions to think about:

* Is the "evaluation methodology" expected to be carried out by one
person or by a group of more than one persons?

* What is the expected level of expertise (in accessibility, in web
technologies etc) of persons carrying out an evaluation?

* Is the involvement of people with disabilities a necessary part of
carrying out an evaluation versus an improvement of the quality?

* Are the individual test results binary (ie pass/fail) or a score
(discrete value, ratio, etc)?

* How are these test results aggregated into an overall score (plain
count, weighted count, heuristics, etc)?

* Is it useful to have a "confidence score" for the tests (for example
depending on the degree of subjectivity or "difficulty")?

* Is it useful to have a "confidence score" for the aggregated result
(depending on how the evaluation is carried out)?

Feel free to chime in if you have particular thoughts on any of these.


Shadi Abou-Zahra - http://www.w3.org/People/shadi/
Activity Lead, W3C/WAI International Program Office
Evaluation and Repair Tools Working Group (ERT WG)
Research and Development Working Group (RDWG)

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Received on Tuesday, 23 August 2011 12:34:03 UTC

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