previous poster's claim is a common piece of folk wisdom that ultimately stems from this paper: https://pubmed.ncbi.nlm.nih.gov/16298429/ 2005, n=187. the authors are blanchardites so the language they use is needlessly confusing, but they find 107.3 mean iq among the male-attracted trans women, 121.7 among the female-attracted

interestingly while pulling this up I also found this one from 1967(!) https://nyaspubs.onlinelibrary.wiley.com/doi/abs/10.1111/j.2... n=34, which found half in the 110-119 range and eight over 140