The effects of language bias and cultural bias estimated using the method of correlated vectors on a large database of IQ comparisons between native Dutch and ethnic minority immigrants from non-Western countries

It is concluded that mean differences in intelligence between native Dutch and ethnic minority immigrants from non-Western/non-Westernized countries in the Netherlands can be very strongly explained by the complexity of the subtests in an IQ battery, with a small effect of language bias, and very little place left for cultural bias.