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)
| mctd | Existing mcTestAnalysis data object |
|---|---|
| pct | Percentage for top/bottom comparison |