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date: 20 July 2019

Abstract and Keywords

Categorical methods refer to statistical procedures for analyzing data when the outcome variable is binary, nominal, or ordinal, according to Stevens’ (1946) popular taxonomy of scale types. Myriad such methods exist. This chapter is focused specifically on methods for a single binary or ordinal outcome. The methods addressed are: the Pearson χ2 statistic, the mean score statistic, the correlation statistic, midrank scores, odds ratios, differences between proportions, the γ-family measures of ordinal association, the Mantel-Haenszel test, the Mantel test, average conditional effect sizes, the Breslow-Day-Tarone test, binary logistic regression, and the proportional odds logistic regression model.

Keywords: Discrete, binary, ordinal, Likert-type, chi-square, logistic, Mantel-Haenszel

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