Wikipedia and Wikidata help discover entities and references. IQ Caddy reviews and cites the original source wherever possible. Inclusion does not imply that a source endorses this atlas.
National Institute of Standards and Technology · 2013 · Accessed 2026-08-11
United States government work (public domain in the U.S.). NIST-authored material is not subject to U.S. copyright; attribution is requested.
National Center for Education Statistics · 2024 · Accessed 2026-08-11
United States government work (public domain in the U.S.). NCES content produced by federal employees is generally public domain; cited third-party material can differ.
National Center for Education Statistics · 2020 · Accessed 2026-08-11
United States government work; underlying PIAAC terms apply. The U.S. estimates and site are federal products; users should retain OECD/PIAAC attribution where identified.
United States Census Bureau · 2024 · Accessed 2026-08-11
United States government work (public domain in the U.S.). Census Bureau data are free to use with source attribution; logos and third-party content are excluded.
Journal of Intelligence (MDPI) · 2022 · Accessed 2026-08-11
Creative Commons Attribution 4.0 International. Attribution must identify Bryan J. Pesta, the article, journal, year, and DOI.
World Bank · 2021 · Accessed 2026-08-11
Creative Commons Attribution 4.0 International. Use is subject to the license shown for the specific catalog resource and World Bank dataset terms.
World Bank · 2024 · Accessed 2026-08-11
Creative Commons Attribution 4.0 International. Use is subject to the license shown for the selected release; estimates combine learning and schooling inputs.
World Bank · 2026 · Accessed 2026-08-11
Creative Commons Attribution 4.0 International (dataset). The data catalog asset license governs the dataset; related publications can carry CC BY-NC 3.0 IGO.
UNESCO Institute for Statistics · 2025 · Accessed 2026-08-11
Creative Commons Attribution-ShareAlike 3.0 IGO. Retain UNESCO-UIS attribution, indicate changes, and follow the license and platform terms for the selected release.
United Nations Development Programme · 2025 · Accessed 2026-08-13
Creative Commons Attribution 3.0 IGO. UNDP HDR statistical materials are offered under CC BY 3.0 IGO; retain attribution and the HDI-revision disclaimer.
World Bank · 2020 · Accessed 2026-08-13
Creative Commons Attribution 4.0 International (IGO). Used for the Venezuela 2020 harmonized test score published in the HCI 2020 country brief; the 2025 HCI+ file has no Venezuela row.
IQ Caddy · 2026 · Accessed 2026-08-13
Unlicensed project content; estimates are labeled as informal. Proof-of-concept fill-ins so every profile shows a number. They are not tests, not official statistics, and not peer-reviewed national IQ scores.
Nobel Foundation · 2026 · Accessed 2026-08-11
Creative Commons Zero 1.0 Universal. The Nobel API services are free to use under CC0 subject to their service terms.
Wikimedia Foundation · 2026 · Accessed 2026-08-11
Creative Commons Zero 1.0 Universal. Structured Wikidata statements are released under CC0; referenced external sources retain their own rights.
National Archives and Records Administration · 2026 · Accessed 2026-08-11
Public domain metadata; item-level rights vary. Catalog metadata is generally a U.S. government work. Check each archival item's use restrictions and include NARA's API non-endorsement notice when applicable.
Library of Congress · 2026 · Accessed 2026-08-11
Item-level rights vary. The Library does not grant a blanket license for collection items; inspect each Rights and Access statement.
Political Psychology (Wiley) · 2006 · Accessed 2026-08-11
All rights reserved. Only factual citations and a small curated set of reported estimates are represented; the article is not redistributed.
Russell T. Warne · 2023 · Accessed 2026-08-11
All rights reserved. Cited as analysis; no article text or media is redistributed.
Full Fact · 2025 · Accessed 2026-08-11
All rights reserved. The verdict is cited and summarized; Full Fact text and graphics are not redistributed.
Mensa International · 2026 · Accessed 2026-08-11
All rights reserved. Policy is cited for percentile context; test content and proprietary conversion tables are excluded.
American Association on Intellectual and Developmental Disabilities · 2021 · Accessed 2026-08-11
All rights reserved. Guidance is cited to explain that diagnosis requires adaptive-behavior and developmental-context evidence, not an IQ number alone.
Pantheon Books · 1992 · Accessed 2026-08-13
All rights reserved. Cited only for the biographical report of a school IQ score; the book text is not reproduced.
Wikipedia · 2026 · Accessed 2026-08-18
Creative Commons Attribution-ShareAlike 4.0. Biographical facts are cited from Wikipedia; article text is not reproduced.
Wikipedia · 2026 · Accessed 2026-08-18
Creative Commons Attribution-ShareAlike 4.0. Biographical facts are cited from Wikipedia; article text is not reproduced.
Wikipedia · 2026 · Accessed 2026-08-18
Creative Commons Attribution-ShareAlike 4.0. Biographical facts are cited from Wikipedia; article text is not reproduced.
Miller Center (University of Virginia) · 2026 · Accessed 2026-08-18
All rights reserved. Biographical scholarship cited for educational and career milestones; no text reproduced.
Miller Center (University of Virginia) · 2026 · Accessed 2026-08-18
All rights reserved. Biographical scholarship cited for educational and career milestones; no text reproduced.
Associated Press · 2017 · Accessed 2026-08-18
All rights reserved. Cited for the finding that Trump did not graduate with honors from Wharton; article text is not reproduced.
The Daily Pennsylvanian · 2017 · Accessed 2026-08-18
All rights reserved. Cited for the 1968 commencement program showing no honors; article text is not reproduced.
Associated Press · 1987 · Accessed 2026-08-18
All rights reserved. Cited for Biden's law school class rank (76th of 85) and scholarship details; article text is not reproduced.
The New York Times · 2007 · Accessed 2026-08-18
All rights reserved. Cited for Obama's Columbia years and thesis; article text is not reproduced.
Harvard Law School · 2026 · Accessed 2026-08-18
All rights reserved. Cited for Obama's Harvard Law Review presidency and magna cum laude graduation.
Barack Obama Presidential Library (NARA) · 2026 · Accessed 2026-08-18
Public domain (U.S. government work). Cited for Obama's educational timeline and career milestones.
Encyclopaedia Britannica · 2026 · Accessed 2026-08-18
All rights reserved. Cited for Obama's educational history and degree confirmation.
Encyclopaedia Britannica · 2026 · Accessed 2026-08-18
All rights reserved. Cited for Trump's educational history and degree confirmation.
Encyclopaedia Britannica · 2026 · Accessed 2026-08-18
All rights reserved. Cited for Biden's educational history and degree confirmation.
USA Today · 2024 · Accessed 2026-08-18
All rights reserved. Cited for Trump's Fordham-to-Wharton transfer and degree details.