Whether your measurements meet the criteria for an interval scale is,
ultimately, a matter of your belief regarding whether or not the
relationship between the truth and your data is linear -- and that, I opine,
is always a matter of faith. One transcendental solution is to define the
reality with which you are dealing as being a linear function of the data
you have at hand -- much like one often, in practice, defines the population
on the sample (I generalize my results to whatever population for which
these data could be considered to be a random sample) rather than vice
versa.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++ Karl L. Wuensch, Department of Psychology, East Carolina University,
Greenville NC 27858-4353 Voice: 252-328-4102 Fax: 252-328-6283
[EMAIL PROTECTED] http://core.ecu.edu/psyc/wuenschk/klw.htm
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