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- From: akm@atlantix.cs.uoregon.edu (Anant Kartik Mithal)
- Newsgroups: comp.human-factors
- Subject: Re: Mouse-warping considered harmful
- Message-ID: <1992Nov21.072246.25536@cs.uoregon.edu>
- Date: 21 Nov 92 07:22:46 GMT
- Article-I.D.: cs.1992Nov21.072246.25536
- References: <1ef01cINNpo4@flop.ENGR.ORST.EDU> <1992Nov19.202501.14118@medusa.prime.com> <By0z5s.18p@mtholyoke.edu>
- Sender: news@cs.uoregon.edu (Netnews Owner)
- Organization: University of Oregon Computer and Information Sciences Dept.
- Lines: 40
-
- >In article 1ef01cINNpo4@flop.ENGR.ORST.EDU, atwoodj@CS.ORST.EDU (John Atwood) writes:
- > >What's _mouse warping_?
- >[...]
- >For example, a popup is displayed and you are required to respond by
- >pushing a button. The system anticipates your response and moves the
- >pointer to the button ready for you to push it.
-
- I agree. I have been doing a series of experiments involving the
- Fitts' Law evaluation of pointing devices. The program required
- subjects to click in a square, then in a circle. We measure the time
- between the two clicks. In order to prevent there being two sets of
- learnig going on, we center the cursor in the square prior to the
- start of every trial.
-
- While this is necessry for us because of the experimental conditions,
- most of my subjects have found it very irritating, and they tend to
- make large corrective movements bringing the cursor 'back' to the
- square. This is, of course, a problem because the cursor is already in
- the square, and all such movement takes it out of the square.
-
- I think that what happens is that subjects/users expect the cursor to
- be under *their* control, and moving it messes up whatever cognitive
- picture they have of that control.
-
- A side issue is that if a bunch of target circles appear, say,
- generally to the left of the starting square, the mouse tends to go
- off to the edge of the table/mouse pad. This is inconvenient. If,
- however, they had to reposition the cursor on their own, this would
- not happen.
-
- They do, however, get used to the repositioning action...
-
- cheers,
-
- kartik
- --
- If you quote my article remember to trim it down to the essentials.
- Anant Kartik Mithal, akm@cs.uoregon.edu
- Network Manager, Ph.D. Student (503)346-3989
- Comp. Science, U of Oregon, Eugene, OR 97403 (503)346-5373 (fax)
-