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- Path: sparky!uunet!paladin.american.edu!auvm!SATURN.GLASSBORO.EDU!GOLDSTEIN
- Message-ID: <0095DF20.F2582C20.11464@saturn.glassboro.edu>
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- Date: Wed, 22 Jul 1992 08:26:52 EDT
- Sender: "Control Systems Group Network (CSGnet)" <CSG-L@UIUCVMD.BITNET>
- From: goldstein@SATURN.GLASSBORO.EDU
- Subject: stick patterns
- X-To: CSG-L@VMD.CSO.UIUC.EDU
- Lines: 55
-
- To: Pat Alfano
- From: David Goldstein
- Subject: re.: data analysis
- Date: 06/21/92
-
- Your question raises, in a concrete form, the issues involved in
- how HPCT research differs from standard psychological research
- which Rick Marken and others have been discussing in general
- terms.
-
- Bill Powers gave his answer. I will not try to improve upon it
- but just observe from his answer:
-
- (1) The experience which a subject was controlling was identified
- in its most simple form. Bill identified it as the angle of a
- single stick. Pat, do you agree with this alteration of the task?
-
- (2) The seating arrangement of the subject with respect to the
- experimenter was identified as a disturbance. Another one was the
- angle of the experimenter's stick. Others would call these
- independent variables. I note that the two disturbances
- identified have an obvious impact on the experience. In that the
- focus is on the control of experience, it is important to select
- disturbances which will, without a doubt, impact on the
- experience being studied. This is different than the standard
- approach in which the effectiveness of the independent variable
- is uncertain.
-
- (3) Lots of data is collected from a single person. A person is
- intensely studied. The expectation is that the phenomenon will be
- apparent without statistics. I am not exactly sure what the
- phenomenon is in your case. I guess it is that the ability of
- people to control in this task varies with the angle of the lines
- making up the pattern; diagonals present special problems to
- people. Is this the phenomenon?
-
- I was surprised that Bill chose time to be the main measurement.
- I thought he would have chosen error, the difference between the
- subject's stick angle and the experimenter's stick angle. Maybe
- he can explain this choice.
-
- (4) The task strategies which you identified are higher level
- experiences which the person is controlling in the course of
- performing the task. See Dick Robertson's comments about this in
- the textbook he and Bill edited.
-
- Just as an aside, I did a reasearch project related to yours when
- I was a graduate student. There are interesting developmental
- changes in the ability of people to perform such tasks. This was
- in my pre-HPCT days.
-
- Goldstein, D.M. & Wicklund, D.A. (1973). The acquisition of the
- diagonal concept. Child Development, 44, 210-213.
-
- Best of luck with your research project.
-