Internal MCQ version registry
Arguments
- items
Number of MCQ items (27 or 21)
Value
List with the version's design table (in ladder order), items,
per-magnitude item count, overall ladder edge k, and k-rank labels.
Details
Edge conventions mirror the Kaplan et al. (2014) Excel scorers:
overall ladders append 0.25 (27-item) / 0.1333 (21-item) past the
steepest item; magnitude ladders repeat their last kindiff.
