Measures of Ordinal Association: A New Look at an Old Problem

Evidence shows that the gamma coefficient (Goodman & Kruskal, 1954) as a measure of association between two classifications either overestimated or underestimated the degree of association in the 2 × 2 case in most situations, underestimated the degree in the m × 2 ( m > 2) case, and was subj...

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Veröffentlicht in:Methodology 2009, Vol.5 (4), p.112-122
Hauptverfasser: Cheng, Chao-Ming, Lin, Wen-Ying
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description Evidence shows that the gamma coefficient (Goodman & Kruskal, 1954) as a measure of association between two classifications either overestimated or underestimated the degree of association in the 2 × 2 case in most situations, underestimated the degree in the m × 2 ( m > 2) case, and was subject to restricted-range and fineness/coarseness effects. This study is to treat the degree of association as the extent to which the percentage of observations falling into a class on one classification can be increased by an increase from one class to another on the other classification. A statistic computing the relative magnitude of the percentage increase to its maximal increase, designated as C p , is ideal for measuring the degree without being contaminated by other factors. Moreover, the value of C p is accurate and stable across different portions of classification data and free from restricted-range and fineness/coarseness effects.
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subjects Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychometrics. Statistics. Methodology
Statistical Measurement
Statistics
Statistics. Mathematics
title Measures of Ordinal Association: A New Look at an Old Problem
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