In Flynn, J. R. (2011). Secular changes in intelligence. In R. J. Sternberg & S. B. Kaufman (Eds.), The Cambridge handbook of intelligence (pp. 647–665). Cambridge University Press the author writes:
"In 1948 Reed Tuddenham was the first to present convincing evidence of massive gains on mental tests using a nationwide sample."
Is the “convincing evidence” in an article?
I found an answer to my question.
The spelling in the 2011. J.R. Flynn article is incorrect. The correct spelling is Read Tuddenham.
Here is a link to Read Tuddenham's 2009 obituary on the University of California website:
https://senate.universityofcalifornia.edu/_files/inmemoriam/html/readctuddenham.html
Read Tuddenham's first name was also misspelled as Reed, at page 2, Flynn, J.R. What is Intelligence, 2007.
Marat Assanovich
Thank you, good work.
I previously found the article in a couple of places, made easier if the first name is correctly spelled Read (not Reed).
Tuddenham, R. D. (1948). Soldier intelligence in World Wars I and II. American Psychologist, 3(2), 54–56. https://doi.org/10.1037/h0054962
and on archive.org in
https://archive.org/details/sim_american-psychologist_1948-02_3_2/mode/2up.
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