RE: [agile-usability] Interaction design rules of thumb - do they exist?
- Thanks Jon...> the form is asking for a number that can be up to 8 digits long.
This implied that there were no leading non-significant characters, but only up to eight digits, so I'm not sure your first example is valid in this case.The second example however, is interesting. As a user I do face this problem, e.g. when entering a credit card number. I'd like the application itself to impose spacing between groups of digits (four in this particular example) so it looks like the number on my card. I would not want to actually type those spaces as that would just be annoying. So I would still want to restrict data entry to digits only, and have the application deal with presenting the data back to the user in a meaningful way.Of course, what I am really saying here is "it depends" :-) A solution for entering credit USA card numbers (which are always 16 digits) will not work for entering (e.g.)international postal codes (which may be letters and/or numbers). But still, in relation to Jeff's exact statement "the form is asking for a number that can be up to 8 digits long" I can't think of a good time that restriction to numeric input and a max of eight characters would be a bad thing. If the statement is badly formed, perhaps, but that is another topic.Tobiashttp://agilethinking.net/blog/ <-- new blog
Jon Meads <jon.meads@...> wrote:Tobias,If the user has the number in a different format than that expected by the implementers (e.g., has leading zeroes or a non-significant set of lead digits or characters), it might be wise to allow more than 8 digits and only use the significant digits for the application. Also a lot of long numbers (>5 digits) are hard to input and visually verify unless they are entered as 3 or 4 digit chunks. That means allowing a separator would make it more usable. And then there are the "unknown things we don't know about".Cheers,jon
From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Tobias Mayer
Sent: Monday, July 10, 2006 5:31 PM
Subject: RE: [agile-usability] Interaction design rules of thumb - do they exist?Jeff, John,I am not in favour of "rules of thumb" either, but in this particular case would one of you provide a concrete example of when it would NOT be a good idea to restrict the data entry to only digits (with a maximum of 8 characters). I'm having a difficult time imagining when or how this restriction would be considered a hinderence.Tobias
Jon Meads <jon.meads@...> wrote:Jeff,Rega! rdless of what the developers would like, the correct answer remains, "it depends". Anyone seeking who wants to use "rules of thumb" instead of appropriate user studies will risk turning out substandard, if not unusable, designs. But if you want to check out guidelines, I recommend http://www.usability.gov/Hope all is well - give a call if you are up Seattle way.Cheers,jonJon Meads, Usability Architects, Inc.
Designing the User Experience425-827-9296, jon@...
From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Jeff Patton
Sent: Monday, July 10, 2006 3:13 PM
Subject: [agile-usability] Interaction design rules of thumb - do they exist?Just now a coworker asked me a question on inputing numbers into a text
box... the form is asking for a number that can be up to 8 digits
long. He asked what seem like simple questions:
do you restrict data entry to only digits?
do you restrict entry to only 8 digits?
The very unsatisfying answers I give to questions like these are "It
depends." I'll ask "how is number entry handled elswhere in the
application? " "Are the users doing heads-down data entry, or are they
filling out the form more interactively? " "What are the numbers being
entered? - what do they represent?" This line of questioning usually
gets in the way of the hard and fast answers people are looking for.
So my question for this group is: does a book/reference of boilerplate
UI/IxD rules of thumb exist?
Or, secondarily, is there a good place to track down usability research
on specific topics - such as the best way to enter numbers into form
- For me, I found sequence diagrams work well. Buy it may just be my style.
From: "Desilets, Alain" <alain.desilets@...>
Date: Fri, 14 Jul 2006 07:20:27
Subject: RE: [agile-usability] Interaction design rules of thumb - do they exist?
BTW, one of the things that doesn't work often enough is asking the users to report what they were doing. Many times I have seen users do one thing and then tell me that they did it differently. I would have doubted my sanity if I hadn't had co-observers with me.
Does this happen even in talk-aloud situations?