trichotomize

trichotomize

(traɪˈkɒtəˌmaɪz) or

trichotomise

vb (tr)
to divide into three parts or categories
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
For such purposes investigators all too commonly categorize (e.g., dichotomize or trichotomize) a predictor variable and then apply ANOVA.
Generally, multiple bivariate correlation is used to assess the hypothesized association, although some authors dichotomize or trichotomize the self-report measures of mental imagery and perform multiple t- and F-tests (e.g.
Professor Rakove's essay serves as a useful beginning, since it struggles with the same conceptual problems that have led me to trichotomize legal change into ordinary, unconventional, and totalizing varieties.
If one wishes to trichotomize, the middle group can serve, potentially, as neutral comparison group, but only if the distribution makes it truly neutral.