Artur Ferreira

Joint pre-registration: ChatGPT stored copies and Crawled labels (system1 and system2) across two sites

Joint pre-registration for a descriptive study of OpenAI stored copies and Crawled labels in ChatGPT (system1 and system2), run on two sites (thegeolab.net and datairi.com). This record is the signed final protocol, version 0.4.3, dated 11 October 2026. File: joint-preregistratio...

Paper B: Field Baseline Results. Does presentation format affect blind entity retrieval and brand attribution in production generative engines?

Results for the pre-registered field baseline deposited as version 1.0 of this record (DOI 10.5281/zenodo.22798718, 16 September 2026). This version reports the registered dependent variables, completes Section 9 of the pre-registration from the session logs, and deposits the evi...

Paper B: Field Baseline Results. Does presentation format affect blind entity retrieval and brand attribution in production generative engines?

Results for the pre-registered field baseline deposited as version 1.0 of this record (DOI 10.5281/zenodo.22798718, 16 September 2026). This version reports the registered dependent variables, completes Section 9 of the pre-registration from the session logs, and deposits the evi...

E040 pre-registration: query surface form and citation rate on Perplexity (keyword, interrogative and conversational forms against three fixed pages)

This pre-registration sets out an observational study of whether changing the wording of a query affects whether Perplexity cites a page, while keeping the concept and target page fixed. The study uses the direct Perplexity API with the model string `sonar`, temperature 0 and `se...

E100 pre-registration: does clearing non-body content from the post-H1 snippet window change whether ChatGPT cites a page, when the page body is held constant?

E100 is a pre-registered matched-pair experiment testing whether clearing non-body content from the window immediately after a page's H1 changes whether ChatGPT cites the page, with the page body held constant. Two pages on thegeolab.net share an identical title, H1 and body belo...

E100 pre-registration: does clearing non-body content from the post-H1 snippet window change whether ChatGPT cites a page, when the page body is held constant?

E100 is a pre-registered matched-pair experiment testing whether clearing non-body content from the window immediately after a page's H1 changes whether ChatGPT cites the page, with the page body held constant. Two pages on thegeolab.net share an identical title, H1 and body belo...

E100 pre-registration: does clearing non-body content from the post-H1 snippet window change whether ChatGPT cites a page, when the page body is held constant?

E100 is a pre-registered matched-pair experiment testing whether clearing non-body content from the window immediately after a page's H1 changes whether ChatGPT cites the page, with the page body held constant. Two pages on thegeolab.net share an identical title, H1 and body belo...

Live Retrieval and Citation of Orphan Synthetic Entities by Consumer Generative Engines: Results Against a Preregistered Protocol

Results record for the preregistered study deposited as DOI 10.5281/zenodo.21705818. The preregistered 2x2 (entity density × content structure) is declared non-interpretable due to a length-parity deviation, reported under the deviation clause. What survives, from confirmatory ru...