2 In other words, those who administer intelligence tests quite literally do not know what they are doing. That is why David McClelland remarked, “Psychologists should be ashamed of themselves for promoting a view of general intelligence that has engendered such a testing program.” Joseph Weizenbaum summed it up by saying, “Few ‘scientific’ concepts have so thoroughly muddled the thinking of both scientists and the general public as that of the ‘intelligence quotient’ or ‘IQ.’ The idea that intelligence can be quantitatively measured along a single linear scale has caused untold harm to our
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