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CHI-WEB  November 2003, Week 4

CHI-WEB November 2003, Week 4

Subject:

SUMMARY: Button Order for Blind Users (Delete & Cancel buttons)

From:

Leslie Carter <[log in to unmask]>

Reply-To:

Leslie Carter <[log in to unmask]>

Date:

Sun, 23 Nov 2003 14:39:20 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (118 lines)

ORIGINAL QUESTION
------------------------
If you were creating a web site for seeing and blind users, in what
sequential order would you put the Cancel & Delete buttons in comparison to
other buttons on a page? Let's say that there is a Cancel button on the
bottom of each page, and that there might also be any of these buttons
beside it: Save, Add, Preview, and Delete. Pick one of the following button
orderings that you think is the best:

1) Always make the Delete button last button in the button tab order. When
Cancel and Delete are on the same page, Delete should be the last button.
Possible rationale: Always place the most destructive button last to lessen
the chance of destructive user errors.

2) Always make the Cancel button last in the tab order whether or not a
Delete button is also included on the page.
Possible rationale: Blind users may become accustomed to thinking that the
Cancel button is always last and not realize that there is SOMETIMES another
button, the Delete button, following it. In addition, the most frequently
used actions should come first in the tab order to improve user efficiency,
and Cancel will probably be used less frequently than Save, Add, Preview or
Delete.

RESPONSES - I didn't find any clear consensus here.
-------------------------------------------------------

Since most users, blind or sighted, are Windows users and are accustomed to
having the Cancel button on the lower right in a dialog box, I think it's
best to follow this convention everywhere, including on Web pages. I was
recently using eRoom. They place all button groups that include Cancel
buttons in the upper left. I found this most disconcerting, because the
buttons were placed outside my task sequence. I read content and/or selected
options, then thought where are the buttons, because the bottom of the page
was empty.

Also, the natural scanning direction for sighted users is from the upper
left to the lower right. Therefore, it's best to place a Delete button a bit
out of the way so users don't accidentally click it--for example on the far
left. If there are checkboxes to the left of multiple items in a list, this
also places the Delete button in proximity to the check boxes.

Your rationale for the second option makes sense to me.

Most of the buttons you mentioned would seem to apply to an item selected in
a list, with the exception of the Add button. So, I probably wouldn't
include the Add button in the grouping of buttons. I'd likely place it at
the top of a Web page.

Pabini Gabriel-Petit
Spirit Softworks
-------------------------------------------

Suppose there is no silver bullet.
Choise depends on usage stats greatly.

If "Delete" action is ordinary, it should not be positioned last.
If "Delete" action used rarely, it could be positioned last.
If there is choice between "Delete" & "Cancel" -- it should be dealt
by understanding possible harm caused misclick on "Delete" &
possible annoyance caused by tabbing to misfocused button almost each
time processing this choice.

Sincerely, Nikolai Iaremko.
----------------------------------------

    As a developer, who is also blind, I would be inclined to put the most
frequently used buttons first. The order in which Cancel or Delete would
appear would be dependant on the frequency with which you expect either to
be used.

    I don't particularly think that blindness is relevant in this case. As
long as the layout and sequence of the buttons is consistent on *every page,
then users with visual, physical and cognitive disabilities will benefit,
alongside their able contemporaries.

Léonie
-------------------------------------------

I would go with option 2 for the reasons that you mentioned. They rely on
tabbing; therefore, if you can save them one tab, bingo! To prevent fatal
error, use warning messages in case they hit Delete or Cancel by mistake to
alleviate the risks mentioned in option 1.

Yves

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

I should go for the second option (always provide an exit button at the
lower
right corner) and adjusing the tabbing order accordingly.
Other buttons are optional, so the Cancel is the only one that will appear
on
every page. This makes design consistent even when there is only a Cancel
button.

Rik Manhaeve
---------------------------------------------

Neat problem.  Back in grad school I did some research with blind users
and the only suggestion I have is simply to make sure the buttons are
consistently located.  Pretty obvious I guess but I was amazed at how
much "chunking" the blind do when memorizing layouts, locations, etc.
Anything you can do to facilitate this seems to help them.

Ralph Lord
System Analyst
Northrop Grumman Mission Systems
Centers for Disease Control and Prevention
770.234.6562

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