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Taylor, Dianne L.1
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Mutilating Data and Discarding Variance: The Dangers of Dichotomizing Continuous Variables.
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Kroff, Michael W. – 2002
This paper reviews issues involved in converting continuous variables to nominal variables to be used in the OVA techniques. The literature dealing with the dangers of dichotomizing continuous variables is reviewed. First, the assumptions invoked by OVA analyses are reviewed in addition to concerns regarding the loss of variance and a reduction in…
Descriptors: Analysis of Variance, Heuristics, Regression (Statistics), Reliability
Invariance Testing in Discriminant Analysis: A Heuristic Application of the Jackknife Procedure and Procrustean Rotation.
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Taylor, Dianne L.; Tucker, Mary L. – Measurement and Evaluation in Counseling and Development, 1995
Describes two invariance tests, the jackknife procedure and Procrustean rotation, and applies them in a discriminant analysis for this heuristic study. Invariance testing helps to prevent overemphasis on findings of statistical significance and overgeneralization of a research result, and thus is gaining favor as an indicator of result importance.…
Descriptors: Analysis of Variance, Concurrent Validity, Discriminant Analysis, Heuristics