This category is meant to hold information related to the academic controversy over race and intelligence. The debate concerns possible explanations of group differences encountered in the study of race and intelligence. Since the beginning of IQ testing around the time of World War I there have been observed differences between average scores of different population groups, but there has been no agreement about whether this is mainly due to environmental and cultural factors, or mainly due to some genetic factor, or even if the dichotomy between environmental and genetic factors is the most effectual approach to the debate.