RE: [agile-usability] Interaction design rules of thumb - do they exist?
MessageI can't speak to the rules of thumbs thing, but I think "it depends" IS the right answer.For example, if the N-digit number happens to be a credit card number, then the right approach is to:- Allow anywhere between N and N+N/4+1 characters- Strip out any spaces from the input- If the number is not valid, tell the user why, and redisplay the form WITH THE ERRONEOUS NUMBER STILL THEREI'm SO SICK of web sites which insist that I should enter my credit card number without spaces. My credit card lists that number with a blank every 4 characters, so why would I want to type it without the blanks? There is a good reason why credit card companies put blank characters every 4 digit! I makes the number easier to transcribe and verify. To make things worse, many of those sites then just tell me that the number was wrong and present me with a blank field where I have to retype the number from scratch, instead of just identifying the mistake in the one I typed.Alain-----Original Message-----
From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Jeff Patton
Sent: Monday, July 10, 2006 6:13 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?