In addition to the usual professional publications, the psychologist also publishes in controversial publications such as Mankind Quarterly – described by the American human rights organization Southern Poverty Law Center as 'the racist pseudo-scholarly Mankind Quarterly' – in which a comeback of eugenics is openly advocated. His papers have titles such as: “Why Do Northeast Asians Win So Few Nobel Prizes?”, “Does cultural background influence the intellectual performance of children from immigrant groups?”, “Group differences in mean intelligence for Dutch and third world immigrants”, “Spearman's hypothesis tested on European Jews vs non-Jewish Whites and vs Oriental Jews: Two meta-analyses”, “Solving the puzzle of why Finns have the highest IQ, but one of the lowest number of Nobel prizes in Europe”, “Spearman's hypothesis tested on Black adults: A meta-analysis”, “Spearman's hypothesis not supported? Three meta-analyses of Black and White prisoners, Northeast Asians, and Arabs and Jews”.
