... one should note that this was not necessarily an accurate measure of his cognitive ability, as noted by Stephen Hsu in this Psych Today interview:
https://www.psychologytoday.com/blo...hard-feynmans-low-iq-and-finding-anotherIn that era, it is likely that an individually-administered test would be an old Stanford-Binet, which was heavily loaded for verbal ability, and not so much for mathematical ability. If it was group-administered, it would be even more questionable in its ability to capture mathematical giftedness. You'll also notice that there appears to be some circumstantial evidence from Dr. Hsu's anecdotal reports that Feynman may have had a second exceptionality, such as dyslexia or dysgraphia, as he observed frequent errors in writing mechanics (spelling and punctuation) in his notebooks.
