Discovery Lab Answers

The honest answer is that the library’s share of the published parapsychology literature has not been measured in a way that produces a single percentage or count I can give you.

Here is what can be said accurately:

What the library is — and is not

The ESP-Nexus grounding corpus is a structured database of thousands of primary-source parapsychology documents — journal articles and books — with full text and extracted metadata indexed for retrieval. That is its public description. No figure has been published for what fraction of the total parapsychology literature that represents.

Why full coverage is unlikely — and openly acknowledged

The project’s own funding notes are candid about a specific gap: pre-2000 parapsychology proceedings — Research in Parapsychology, the Journal of Parapsychology, the Journal of the SPR, and the European Journal of Parapsychology — are not currently indexable at the article level because they have not been digitized in a structured way. Those proceedings span decades of the field’s core experimental record. Source ^[1] — a 2011 editorial from the Journal of Scientific Exploration — underscores the point from a different angle, noting that major physical collections (Rhine Research Center archives, the Parapsychology Foundation library) have faced institutional precarity, meaning even physical preservation of the historical literature is an unsettled problem, let alone digital indexing.

What this means when you use the library

• Any answer this assistant gives about specific empirical findings, effect sizes, or study counts is a sample statistic from what the library holds, not a claim about the field as a whole.
• The sample is not random: the digitization gap means older, pre-2000 experimental literature is underrepresented. Where coverage is skewed, the picture the library projects will tend to overweight more recent, digitally available work.
• The public References page lists works actually cited across the site — a subset of the underlying corpus, rebuilt automatically as citations change. It is a useful signal of what has been engaged with, but not a full inventory of the corpus.

The bottom line

“Thousands of documents” is the stated scale; the fraction of the total published parapsychology literature that represents is unmeasured and not claimed. The pre-2000 proceedings gap is the single largest known structural limitation, and it is one the project names explicitly rather than obscuring. Treat quantitative summaries from this library as findings from a large but partial and skewed-toward-recent holding, not as field-wide statistics.