- From: Scott Luebking <phoenixl@sonic.net>
- Date: Thu, 26 Apr 2001 07:37:05 -0700
- To: bill.haneman@ireland.sun.com, phoenixl@sonic.net
- Cc: aaronl@chorus.net, joki@netscape.com, mozilla-accessibility@mozilla.org, w3c-wai-ig@w3.org
Hi, I think it's helpful to remember that people have different abilities and rather than have one universal approach, let the user have the system adapt to his/her needs. For example, many blind users have become quite good at mutiple keys because of screen readers. I'm not fond of multiple keys because of the paralysis in my hands. Scott > Remember that for accessibility it's important to use as few > combo-keystrokes as possible. Even with sticky keys, for a user with, > say, poor hand control, multi-keystroke sequences make the likelihood > of mistyping much higher (error rate multiplies by the number of > keystrokes). > > Example: person with Parkinson's mistypes a key 20% of the time. > > single key: 80% success > double key: 64% success > triple key: 51% success... > > of course hitting backspace to correct is subject to the same error > rate. Admittedly the meta keys are sometimes easier to hit than other > keys. The point is that if it's feasible to use only one shift/meta > key, that's preferable to multiple meta keys. > > > That way the user can make the determination > > at time of use. This actual choice of ctrl, alt, etc should probably > > be configurable because of operating system and also access technology > > conflicts. > > > Yep, very important! > > Regards, > > Bill
Received on Thursday, 26 April 2001 10:37:56 UTC