“IQ Correlates With High Eminence”, Herbert J. Walberg, Sue Pinzur Rasher, Keiko Hase1978-06-01 (; similar)⁠:

Indicators of eminence derived from word and citation counts in primary biographical articles in encyclopedias published at the turn of the century, in 1935, and 1974 correlate positively 0.33 overall with IQ estimates made from biographical sources on a select sample of 282 philosophers, scientists, non-fiction and fiction writers, musicians, artists, religious leaders, statesmen, revolutionaries, and soldiers.

These results are striking since the sample is restricted to the higher end of the eminence distribution; the mean estimated IQ for the total group is 158.9.

Indicators of eminence for some fields—philosophers, musicians, and artists—vary from one period to the next. Individuals also shift in estimated eminence during the three time periods examined.