Five-Point Likert Items: t test versus Mann-Whitney-Wilcoxon

By J. D. de Winter, Dimitra Dodou. 2010

322 citations recorded by the source corpus.

View Paper: https://www.semanticscholar.org/paper/68f3c1623325aafefd00b4d2a5c1fc841a7ca6e7

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Citations in the corpus

• Comparing Two Samples from an Individual Likert Question (2017, methodology): “For two independent samples, De Winter and Dodou (2010) found that both the independent samples t-test and the Mann-Whitney test are generally Type I error robust at the 5% significance level for a five point Likert item.”
• Logistics agglomeration in the US (2014, methodology): “Even if normality assumptions are nearly met by the data, t-tests have a smaller power than the Wilcoxon rank sum test (De Winter and Dodou, 2010).”
• Investigating the Long-Term Impacts of Climate Change Communications on Individuals’ Attitudes and Behavior (2014, methodology): “The comparison of means may therefore be problematic and there is controversy over whether parametric tests may be used with this type of data (e.g., Carifio & Perla, 2007; de Winter & Dodou, 2010; Knapp, 1990).”