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- Path: sparky!uunet!wupost!emory!ogicse!cs.uoregon.edu!atlantix.cs.uoregon.edu!akm
- From: akm@atlantix.cs.uoregon.edu (Anant Kartik Mithal)
- Newsgroups: comp.human-factors
- Subject: Re: Summary: Trackball vs. mouse
- Keywords: trackball, track ball
- Message-ID: <1993Jan2.074518.3732@cs.uoregon.edu>
- Date: 2 Jan 93 07:45:18 GMT
- Article-I.D.: cs.1993Jan2.074518.3732
- References: <1992Dec22.011331.18549@lmpsbbs.comm.mot.com> <1993Jan2.050512.9322@Princeton.EDU>
- Sender: news@cs.uoregon.edu (Netnews Owner)
- Organization: University of Oregon Computer and Information Sciences Dept.
- Lines: 97
-
- In article <1993Jan2.050512.9322@Princeton.EDU> bathurst@phoenix.Princeton.EDU (Bruce Bathurst) writes:
- >I would like to propose, however, that trackballs and mice
- >serve different purposes,
-
- Can you define what these purposes are? Meaning, I would have thought
- that they are both pointing devices, so their purpose is to get the
- cursor pointer to a particular location, and perhaps to click when the
- cursor is at that locaton.
-
- >and different people need different pointing devices:
- >profession typing skill pointing device
- >---------- ------------ ---------------
- >Secretaries Touch Neither
- >Writers Handicaped Trackball
- > Two-fingered Mouse
- > Touch Both
- >
- >Secretaries format as they type, according to the instructions on
- >their paper "copy". For them formatting with control and escape keys
- >is best, for they needn't remove their eyes from the paper; and
- >pointing devices of any kind are of questionable value.
-
- I think that you need to have some real evidence that secretaries
- actually need to keep their hands on the keyboard. I am not saying
- that they do not keep their hands on keyboards, I'm saying that there
- needs to be some strong scientific evidence, as opposed to anecodetal
- evidence that this is true. I'd also suggest that the evidence needs
- to be recent because in light of the changes wrought in the workplace
- blycomputers, it might be that the kinds of tasks that secretaries do
- on computers with pointing devices has drastically changed.
-
- I also don't agree that pointing devices are of use of the secretaries
- of the kind you describe. What you experience might be a cause of the
- kinds of word processors that they are using. In cases where a command
- is one that has a long name (e.g. in Word, selecting a font or
- paragraph sytle), it can be quicker to use a mouse or other pointing
- device. Also, for example, some of the myraid and more obscure
- commands in Emacs that starts with a meta-x sequence. Like meta-x
- replace-string.
-
- >Those who look at the keyboard aren't distracted by having to find a
- >mouse, though handicaped typists with limited movement find trackballs
- >better or necessary.
-
- I don't necessariy agree. I touch type too, and without taking my eyes
- off the screen, can locate my mouse (peripheral vision helps, as well
- as muscle memory of where I left it), and I can grab and use it, and
- get back to my keyboard. From then on, the problems for a mouse and a
- trackball are similar.
-
- In your next article, you suggest a trackball near the space bar. This
- is exactly what Apple has on their powerbooks. That is probably the
- best design of a trackball I've seen so far. Zenith ships a notebook
- with a similar design. At least one other PC clone I've seen has the
- trackball on the 'edge' - the vertical side of the notebook that faces
- the user, sort of 'round the corner.'
-
- / keys /
- / z x c v b n m , . / ^ /
- / space bar /
- -------------------------------
- | ( 0 ) |
- -------------------------------
-
- where the () are the buttons, and the 0 is the trackball. The
- disadvantage of this style is that you can't put a wrist rest next to
- the machine. The Apple style has a built-in wrist rest.
-
- Two approaches designed with the needs of touch typists are the
- HomeRow Keyboard from HomeRow Inc., and the ThinkPad's joystick.
-
- The HR keyboard embedds a joystick under the J key. If you type
- normally on the J key, it behaves like a normal key. If you hold it
- down, and push to any direction, it switches to being a pointing
- device, and the cursor scoots around the screen. The F, D and S keys
- are the mouse buttons. Very easy to program a 45 button mouse using
- this approach... Also a pretty ingenous way of dealing with the
- mode-switch problem.
-
- A couple of touch typists I showed it to loved it. Lots of other
- people who liked the mouse did not like it so much. If you want more
- info about it, write me, we worked on its performance and Fitts
- Law testing, comparing it to a mouse.
-
- The IBM thing (can't remember its name), has a joystick between the
- HJUY keys. It sticks out above the plane of the keyboard about 1mm, so
- it 'doesn't impede typing.' It is also an isometeric joystick, and
- behaves similarly. I'm not sure where the mouse buttons are.
-
- 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)
-