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In 2009 Jelte M. Wicherts, Conor V. Dolan, and Han L.J. van der Maas conducted a new analysis of IQ in sub-Saharan Africa, which was critical of many of Lynn and Vanhanen's methods. [13] Wicherts et al. concluded that Lynn and Vanhanen had relied on unsystematic methodology by failing to publish their criteria for including or excluding studies.
The IQ figures are based on 3 different studies for 17 nations, two studies for 30 nations, and one study for 34 nations. There were actual tests for IQ in the case of 81 countries out of the 185 countries studied. For 104 nations there were no IQ studies at all and IQ was estimated based on the average IQ of surrounding nations. [2]
English: National IQ scores as estimated by Lynn and Vanhanen in their book IQ and Global Inequality. Compared to the previous, PNG version, this SVG version has a consistent legend (one bucket is missing it the PNG version). Adjustments: data for South Sudan are from Sudan and data for Montenegro are from Serbia. Data used for generating the map:
The table below presents the latest Human Development Index (HDI) for countries in Africa as included in the United Nations Development Programme's Human Development Report, released on 13 March 2024 and based on data collected in 2024. [1] As of 2024, all African UN member states are included in the report.
IQ and Global Inequality is a 2006 book by psychologist Richard Lynn and political scientist Tatu Vanhanen. [1] IQ and Global Inequality is follow-up to their 2002 book IQ and the Wealth of Nations, [2] an expansion of the argument that international differences in current economic development are due in part to differences in average national intelligence as indicated by national IQ estimates ...
Assuming that the IQ gap was the result of lower exposure to tasks using the cognitive functions usually found in IQ tests among African American test takers, they prepared a group of African Americans in this type of tasks before taking an IQ test.
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One common approach categorizes Africa directionally, e.g., by cardinal direction (compass direction): North Africa lies north of the Sahara and runs along the Mediterranean coast. West Africa is the portion roughly west of 10° east longitude, excluding Northern Africa and the Maghreb. West Africa contains large portions of the Sahara Desert ...