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disabled range, which, given the circumstances, is impossible. In the end, Thorndike wrote the Pygmalion study's findings were worthless. He summarized his evaluation of the instrument this way: "When the clock strikes thirteen, doubt is not only cast on the last stroke but also on all that have come before....When the clock strikes 14, we throw away the clock." Rosenthal countered that "even if the initial test results were faulty, that didn't invalidate the subsequent increase, as measured by the same test," although, with initial IQ scores

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