W3C home > Mailing lists > Public > w3c-wai-ig@w3.org > July to September 2007

RE: User Testing of Accessiblity Features

From: Alastair Campbell <ac@nomensa.com>
Date: Tue, 28 Aug 2007 18:44:42 +0100
Message-ID: <DBE13196215CF743A3F921EBB877264A28A214@saturn.intranet.nomensa.com>
To: "Tim" <dogstar27@optushome.com.au>
Cc: "WAI Interest Group list" <w3c-wai-ig@w3.org>, "Lachlan Hunt" <lachlan.hunt@lachy.id.au>, <joshue.oconnor@cfit.ie>

Tim wrote:
> If it is just eye candy, it is not html content, call it as a
> background image from the stylesheet rules.

Please refer to the original comments on testing:
http://lists.w3.org/Archives/Public/public-html/2007Aug/0577.html 

Not to mention when I said:
> The issue at hand is not spacers, but content images that do not have
> useful alts, and no realistic means of adding them.

The reasons I believe it would be difficult to test in that fashion are:
- Order effects need to be balanced, you're actually trying to do a
comparison test with three different states. 
- Individual differences between participants are likely to be high, not
only due to the effect Debi Orton noted, but due to different
technologies and settings.
- The responses you are looking for are experience based and quite
subjective, the test-setup could massively bias the results. (In fact,
just asking the setup and questions will indicate what sort of response
you are looking  for.)

In this situation you would be better looking at a persona driven
method, or simply making sure that there is a requirement for reasonable
replacements. 
(I'd recommend reading the notes on Guideline 1 in
http://wcagsamurai.org/errata/errata.html)

Kind regards,

-Alastair

-- 
Nomensa - humanising technology

Alastair Campbell         |  Director of User Experience
t. +44 (0)117 929 7333    |  m. +44 (0)7970 879 653

Defacto, the first fully accessible content management system:
http://www.defacto-cms.com/

Nomensa Email Disclaimer:
http://www.nomensa.com/email-disclaimer.html
Nomensa Ltd, 13 Queen Square, Bristol BS1 4NT
GB 771727411, Company number: 4214477
Received on Tuesday, 28 August 2007 17:44:49 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 19 July 2011 18:14:27 GMT