Respondents are grouped into High- or Low-performing quantiles according to their overall test score and the quantile given by pct. If a middle group exists, it is ignored. Note that the two groups may have differing sizes depending on the number of respondents, questions and the distribution of test scores. A table is returned containing a count, within-group percentage and overall percentage of respondents from each of the performance groups who chose each option for all questions.

summarizeDistractors(mctd, pct = 0.33)



Existing mcTestAnalysis data object


Percentage for top/bottom comparison