Re: Comments-Selecting and Using Web Accessibility Evaluation Tools

Shadi,
1. Actually  a positive result for a test  means that condition being tested  is present in the subject.  Which means a violation  is present. So false positive means that  a violation is indicated when there is none.
2. The Change log  url is still not working.
http://www.w3.org/WAI/EO/Drafts/retrofitting-changelog.html
There are two identical links on that page.
Sailesh

  ----- Original Message ----- 
  From: Shadi Abou-Zahra 
  To: 'Sailesh Panchang' ; 'EOWG' 
  Sent: Friday, October 15, 2004 12:21 PM
  Subject: RE: Comments-Selecting and Using Web Accessibility Evaluation Tools


  Hi Sailesh,

  Thank you for raising. It gets quite tricky with these multiple
  negations, here an example:

  Testing Web content for checkpoint 1.1:
    * Tool result: Pass (positive result)
    * Real result: Fail (actually, there is an error)

  This means the tool would report a false positive by not identifying an
  existing error. Or, as you define, report a positive result (Pass) in a
  subject (Checkpoint 1.1) that doesn't have the necessary attributes
  (actually failed).

  Correct?

  Thanks,
    Shadi


  -----Original Message-----
  From: w3c-wai-eo-request@w3.org [mailto:w3c-wai-eo-request@w3.org] On
  Behalf Of Sailesh Panchang
  Sent: Friday, October 15, 2004 17:33
  To: EOWG
  Subject: Comments-Selecting and Using Web Accessibility Evaluation Tools


  I think the definitions are reversed for false positive / negative:

  "False positives (not identifying existing errors) and false negatives
  (incorrectly reporting errors)."

  False positive= A positive test result in a subject that does not
  possess the attribute for which the test is being conducted. 

  This means an error is reported when none exists.

   

  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> *