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Fragments.

Notebooks on counting what the record leaves out: unseen species models, coverage, and the biases of the archives we inherit.

  1. Interactive Two ends of a folktale archive: Sagenland and Nachtdienst Two browser games built from the Dutch Folktale Database: collect legends in the field in Sagenland, then file them at the archive by night in Nachtdienst.
  2. Interactive Comparing diversity under collection bias An interactive companion to our Royal Society Interface paper on collection bias: set up two assemblages, bias how their records were collected, and see which standardization strategy still recovers the true diversity ratio.
  3. 8 min read What Shall We Do with the Unseen Sailor? Applies unseen species models to VOC historical records to estimate the true number of sailors missing from the archive.
  4. 11 min read Estimating Unseen Shared Cultural Diversity Extends unseen species models to estimate the shared diversity between two cultural collections — how many artefacts they have in common that neither has observed.
  5. 12 min read Population Size Estimation as a Regression Problem Reframes population size estimation as a Bayesian regression problem to correct for heterogeneous detection probabilities in cultural samples.
  6. 10 min read Estimating Richness under Sampling without Replacement Examines how standard unseen species estimators break down under sampling without replacement, and how to correct for it.
  7. 10 min read Demystifying Chao1 with Good-Turing How Good-Turing frequency estimation underpins the Chao1 biodiversity estimator — and what that means for counting unseen cultural artefacts.