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. 2023 Sep 2;2(9):pgad286. doi: 10.1093/pnasnexus/pgad286

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© The Author(s) 2023. Published by Oxford University Press on behalf of National Academy of Sciences.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — A) Percentage and number of domains (of 11,520) with ratings for 6 expert sources. B) Overlaps in rated domains between sources. The diagonal white cells indicate the total number domains with ratings for a given source. The off-diagonal elements indicate, for a given pair of sources, the number of domains that have been rated by both sources. Percent overlap and shading reflect the intersection of domains rated by a given pair of sources divided by the union of domains rated by the same pair of sources. Professional fact-checkers from Pennycook and Rand (16), AFM, Iffy index of unreliable sources (Iffy), MBFC, Lasser et al. (19), and NewsGuard.