Dimitri van der Linden

Dimitri van der Linden is a Dutch psychologist and sexist pseudoscientist who argues females have on average significantly lower IQs than men because they have smaller brains (not withstanding that an "IQ" is a score, not a trait you have). While it is true that women on average have slightly smaller brains than men, there's no evidence this is linked to intelligence (we give more credit to how the brain is wired); furthermore, "It is scientifically well established that there is no difference on average in general intelligence between women and men." For example a number of IQ tests have shown women and men on average, are approximately the same IQ, and any differences are statistically negligible (by <0.5 IQ point).

Unsurprisingly, Linden has struggled to publish his pseudoscience and so was left with the controversial journal Intelligence and the London Conference on Intelligence. Linden et al. 2017 argue against scientific consensus there are no sex differences in intelligence and instead maintain the average IQ of men is 4 points above that of women.