Originally Posted by
sumskilz
Lynn and Vanhanen's estimate of Ethiopia's average IQ is probably inaccurate. They used a convenience sample of 14-15 year-olds who grew up in a refugee camp. This is obviously not a representative sample. In Western countries, heritability of adult IQ is ~80%, whereas mid-childhood heritability is only about ~40%. Childhood iodine deficiency can lower IQ as much as 13 points; 80% of Ethiopians are iodine deficient. One would assume this would be worse for children raised in a refugee camp.