Choose K by the two-signal rule

Signal one is posterior-predictive adequacy: the extra-factor check sits inside the central band and the person check shows no mutual unspanned cluster. Signal two is parsimony: every factor is supported, meaning at least two selected flags and at least one selected distinguishing listing. The selection is the smallest adequate K with all factors supported. When no factor is supported at any rung the verdict separates two opposite situations: a panel sharing nothing (no factor ever attracts two flags) and a panel so unanimous that flags abound but no statement distinguishes any pair — a single shared viewpoint, reported as such. When adequacy and support never coincide, both candidate solutions are reported rather than forcing a winner.

Usage

select_k(ladder, q = NULL, band = c(0.05, 0.95))

Arguments

ladder

A bayesqm_ladder.

q

Re-select the support evidence at this level; NULL (the default) keeps the level the ladder stored.

band

Central adequacy band for the extra-factor percentile (default c(0.05, 0.95)).

Value

A bayesqm_selection with the verdict, the per-rung evidence table, and the selected K (or NA).