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Categorical (also called nominal) data can take on a limited number of possible values called categories. Categorical values "label", they do not "measure". Please use [ordinal-data] tag for discrete but ordered data types.

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Before-after analysis of categorical data

I have carried out an experiment, during which the participants tried several authentication methods; as well as a pre- and post-survey, which measured the participants' familiarity and adoption of sa …