Not long ago, I wrote this article.

You don’t need to ask whether you should ask a question. Just tell us what it is.

On this point, I had in mind intra-national differences. Intergenerational models — at least hereditarian ones — clearly predict that different groups will exhibit varying performances within the same country. This phenomenon, however, has predominantly been documented in countries like the USA and South Africa but not widely elsewhere. Naturally, this lack of evidence leads me to question whether the patterns observed within the USA generalize. Skepticism is warranted. I’ve argue for the necessity of expanded research on intra-national ethnic differences. See: Te Nijenhuis, J., Pesta, B. J., & , J. G. (2024). “General mental ability testing and adverse impact in the United Kingdom: a meta-analysis with more than two million observations,” published in the European Journal of Work and Organizational Psychology, 33(5), 712-725.

I understand that the data quality is often not high, but my impression is that all of the national IQ and achievement data point in broadly the same direction. That is, countries where the majority has African ancestry tend to have lower IQs and countries that have European and East Asian ancestry tend to have higher national IQs. I take it that you don’t think this data is sufficient to establish that there are worldwide race differences in cognitive ability. If so, it would be interesting to hear why at some point.

There are other similarly high scoring predominantly African countries/territories. Wait until I finish up the series of posts and then we can re-evaluation.