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3.2.4 & 3.2.5 IER

From: Jeanne Spellman <jeanne@w3.org>
Date: Thu, 20 Sep 2012 10:58:15 -0400
Message-ID: <505B2F07.3010801@w3.org>
To: UAWG <w3c-wai-ua@w3.org>
As I was finalizing UAAG for publication, I saw that 3.2.4 & 3.2.5 were 
missing an IER. Neither Jim or I could find the text, although we both 
remember talking about it.  Since I REALLY want to have a complete 
document for publishing, I've drafted a new IER for both.  Please 
comment or suggest changes so I can go forward with the publishing 
procedure. Hopefully we can finalize this before the meeting so we can 
discuss levels during the meeting.



3.2.4 Text Entry Undo: The user can reverse recognized text entry 
actions prior to submission. (Level A)

Note: Submission can be triggered in many different ways, such as 
clicking a submit button, typing a key in a control with an onkeypress 
event, or by a script responding to a timer.


Intent of Success Criterion 3.2.4:
Users who are blind or have some visual impairments or cognitive 
disabilities have difficulty determining the location of the keyboard 
focus, and therefore are at risk of entering text in an undesired window 
or location. Users with mobility problems may have difficulty selecting 
the correct form field and may not realize it until they have entered 
text information.  These users need to be able to reverse a text entry 
("Undo") prior to submission.

Examples of Success Criterion 3.2.4:
Billie is a paraplegic who uses speech input. When she is working from 
the main office, she is in a noisy location which can interfere with her 
speech input.   She is writing a blog entry and is almost finishes when 
her speech input software incorrectly interprets some background noise 
as a "select all" command causing her to overwrite her entire blog entry 
with a small phrase.  She uses the "undo" command to reverse the text 
entry and restore her blog entry.

George is blind and uses a screenreader.  He is entering financial 
information into his banking billpaying account.  He types the first few 
letters of the payee from a long list .  When George reviews the 
selection prior to pressing Submit, he hears that he had selected the 
wrong payee.  George uses the "undo" command
Related Resources for Success Criterion 3.2.4:

3.2.5 Settings Change Confirmation:
If the user agent provides mechanisms for changing its user interface 
settings, it either allows the user to reverse the setting changes, or 
the user can require user confirmation to proceed. (Level A)

The description of some user interface settings can be confusing to 
less-technical users; settings changes can have unintended consequences; 
or some disabilities make it more likely that a user can make an 
unintended selection on a preference screen.  Users need to be able to 
reverse changes to the user interface.

Davy has moderately low vision. He is adjusting the contrast of the 
background on his mobile phone when he accidentally selects a white 
background with the previously selected white text, so all the labels of 
the icons disappear.  He can see a highlighted rectangle on the screen 
that usually contains the word Undo when he makes a change on his phone. 
He selects that box and the dark background returns, so he can now read 
the text.  He carefully changes the background to a color with 
sufficient contrast for comfortable reading.

2.7 Preference settings
Received on Thursday, 20 September 2012 14:58:24 UTC

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