People from Western, educated, industrialized, rich and democratic (WEIRD) societies account for as much as 80% of participants in behavioral science studies.
Notes on verification
Traces to Henrich, Heine & Norenzayan (2010) 'The Weirdest People in the World?' and is corroborated by APA Monitor, Oxford Scientist, and academic sources. Related figures (68%, 96%) exist in the same literature depending on the specific breakdown, but the 80% figure itself is independently repeated and consistent with the claim.
Sources
- Are your findings 'WEIRD'? - American Psychological Association (apa.org)
- https://www.nature.com/articles/466029a (nature.com)
- https://www.researchgate.net/publication/44902490_Most_people_are_not_WEIRD (researchgate.net)
- https://oxsci.org/weird-barriers-participant-diversity/ (oxsci.org)
- https://www2.psych.ubc.ca/~ara/Manuscripts/Weird_People_BBS_Henrichetal.pdf (www2.psych.ubc.ca)