/lit/ - Literature

Anonymous Fri May 10 16:13:00 2013 No.3744065 [View]
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>>3744055

In 1959, AAMD set the IQ threshold for mental retardation at < 85. The civil rights movement of the next decade forced psychologists to rethink this boundary, because half of the African American population fell below it. In 1973, responding to this concern, AAMD changed the threshold for retardation from IQ < 85 to IQ < 70. The boundary moved south by one standard deviation! The proportion of blacks below the threshold instantly dropped from about 50 percent to 12 percent. Subsequent refinements made it still more difficult to meet the criteria for retardation.

Erectus Walks Amongst Us
http://erectuswalksamongst.us

Race differences in average IQ are largely genetic
http://www.news-medical.net/news/2005/04/26/9530.aspx

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/lit/ - Literature

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