99.9 th percentile; IQ 146 sd15, IQ 149 sd16

≥ 3.07 standard deviations above the mean

10th WIN member society (since 02/2010)


IQuadrivium is a high-IQ society, similar in a way to Mensa. However, where Mensa’s entry level requirement is a score on a standardized intelligence test at or above the 98th percentile (1 in 50) of the general population, ours is a score at or above the 99.9th percentile (1 in 1,000).

The IQuadrivium Society was founded in February, 1994 by Karyn S. Huntting. At the time, she was the youngest person in history to found a High IQ Society, as well as the world’s only female High IQ Society founder.

The first official member of the IQuadrivium Society was Dr. Ronald K. Hoeflin, author, philosopher, and founder of the Prometheus and Mega Societies.