Permutation Inference

Exact permutation p-values for group–entity association statistics.

Permutation Inference

The Permutation Inference widget.

Overview

Provides distribution-free permutation tests for the association between groups and an entity: it repeatedly shuffles group labels to build the null distribution of a chosen statistic (chi-square, Cramér’s V, total inertia, dimension inertias, or per-cell residuals) and reports the observed value, an empirical p-value, a confidence interval and the null distribution. The residuals test yields a group × entity p-value matrix; clicking a cell outputs its documents.

Inputs

  • Data (Table) — bibliographic data, and/or

  • Group Matrix (Table) — document × group binary matrix (from Setup Groups).

Outputs

  • Result (Table) — observed statistic, p-value, CI, B.

  • Null Distribution (Table) — per-permutation statistic values.

  • Cell p-values (Table) — group × entity p-values (residuals test).

  • Selected Documents (Table) — documents of the clicked cell.

Controls

  • Test Statistic — chi-square / Cramér’s V / total inertia / dimension inertias / residuals.

  • Column + Separator (lists) — the entity column and its list separator.

  • Permutations B (0 = adaptive) — number of shuffles; 0 lets it choose adaptively within a time budget.

  • Adaptive time budget (s) — wall-clock cap when B = 0.

  • Random seed — reproducibility.

  • Adjustment — multiple-comparison correction for the cell p-values.

  • Dimensions — number of CA dimensions (for dimension-inertia statistic).

  • Apply automatically — recompute on change.

Actions: Run Permutation Test.