General Discussion
In reply to the discussion: Are we becoming more STUPID? IQ scores are decreasing [View all]LeftishBrit
(41,205 posts)(1) SAT scores are falling.
This is, however, not replicated in the exam results from other countries and systems. In the UK, GCSE and A level results have generally improved over the years. International Baccalaureate results have been pretty stable over the years.
(2) Ulster University data and analysis on IQ declines worldwide.
That is not 'other evidence'; it is the same very dodgy evidence, by Richard Lynn, that this paper cites. Lynn considers that white people are genetically much more intelligent than black people; that Chinese and Japanese people are more intelligent than either; and that this can explain national differences in health and wealth/poverty (i.e. poverty in developing countries is all because the citizens of these countries are genetically unintelligent). He also considers that men are genetically more intelligent than women. And he tends to twist the evidence to get these conclusions (see my earlier post, and that of Muriel_Volestrangler).
(3) Brain size in humans has been declining for 10,000 years. - Cambridge University
Brain size as such is not what is crucial to intelligence. It depends on which areas of the brain are larger/ smaller, and on the level and type of connections between different areas.