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- Organization: University of Illinois at Chicago
- Date: Wed, 16 Dec 1992 20:15:18 CST
- From: <U53076@uicvm.uic.edu>
- Message-ID: <92351.201518U53076@uicvm.uic.edu>
- Newsgroups: sci.math.stat
- Subject: Levels of Measurement?
- Lines: 34
-
- Organization: University of Illinois at Chicago
- Date: Wed, 16 Dec 1992 19:47:58 CST
- From: <U53076@uicvm.uic.edu>
- Message-ID: <92351.194758U53076@uicvm.uic.edu>
- Newsgroups: sci.math.stat
- Subject: Levels of measurement
-
- Hi,
- Let me first apologize for boring you with such a mundane question. Anyway
- I am in a dispute about levels of measurement and the appropriate statistics to
- use when dealing with data at the ordinal level. I'd like to compare performan
- ce on a communication task across two different contexts. In both cases,
- competence is measured on an ordinal scale, for simplicity's sake, 1, 2, 3. It
- has been my practice in the past to compute a Pearson product-moment correlatio
- n between the two tasks and to use the resulting r as an indication of the
- degree to which performance is consistent across tasks. I recently was told
- that this was an inappropriate test cause I was only at the ordinal level. But
- my references (see esp. Glass & Hopkins, 1984; Heermann & Braskamp, 1970) say
- that the whole levels of measurement question has ben blown out of proportion,
- and that the sort of usage I describe is just fine. What do you think?
-
- Glass, G. V., & Hopkins, K. D. (1984). Statistical methods in education and
- psychology. Englewood Cliffs, NJ: Prentice Hall.
- Heermann, E. F., & Braskamp, L. A. (1970). Readings in statistics for the
- behavioral sciences. Englewood Cliffs, NJ: Prentice Hall.
-
-
- Thanks in advance. If I'm wrong about this, I'd like to change. If I'm right,
- I'd like to rub it in. . . :-)
-
- Bruce Lambert
- Assistant Professor
- Pharmacy Administration
- U. of Illinois @ Chicago
-