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ISSUE SuMMARY for 2.3 Avoiding Content that provokes siezures

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Tue, 17 May 2005 16:42:53 -0500
To: <w3c-wai-gl@w3.org>
Message-Id: <20050517214253.7061960C185@m18.spamarrest.com>

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Issue [1323]

Basically this asks using CSS to provide flashing text would address this.

DISCUSSION:  Flashing text is not provocative so the question is moot.   To
be provocative it would have to be a large block and flash faster than 3
times per second.   

RECOMMENDATION:  Close issue

------------

Issue [1386]

Algorithm is too technical.  Why not make the SC that you just pass the
Trace Tool

DISCUSSION: One cannot tie a standard to a tool for several reasons. One of
which is the tool can be upgraded thus changing the criterion.  Tools must
follow stds not reverse.  

In the long run we intend to remove the detail from appendix and reference
other standards.  So complexity will disappear from doc.  And tool will be
listed as a technique. 

RECOMMENDATION:  Close issue

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Issue [1167]

Is the definition of flash valid when a low vision user uses a screen
magnifier.

DISCUSSION:  Yes - the guideline tells you what is sufficient to conform.
The author is only responsible for meeting the guideline.  If a user uses a
magnifier they may make the stimuli provocative but that is not the fault of
the author.  They can also make it provocative by using a projector and
looking into lens accidentally, or leaning very close to screen etc. 

This cannot be avoided.  We can add an L3 criterion that would provide a
notice if ANY (significant?) number of pixels violate the flash rate.   But
this would be quite aggressive.       

RECOMMENDATION:

Discuss adding level 3 item RE notification. 

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Issue [NEW]

Epilepsy is not the only cause of photosensitive seizures.  Also grammar is
wrong in guideline. 


Recommendation:
Change guideline from 
Allow users to avoid content that could cause photosensitive epileptic
seizures. 
to
Allow users to avoid content that could cause seizures due to
photosensitivity.














Gregg

------------------------

Gregg C Vanderheiden Ph.D. 
Professor - Depts of Ind. Engr. & BioMed Engr.
Director - Trace R & D Center 
University of Wisconsin-Madison 
<http://trace.wisc.edu/> FAX 608/262-8848  
For a list of our listserves http://trace.wisc.edu:8080/mailman/listinfo/ 
Received on Tuesday, 17 May 2005 23:16:09 UTC

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