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“Page 65: The consistent findings about cognitive ability and job performance that apply most directly to group differences in cognitive ability are these: • Measures of cognitive ability and job performance are always positively correlated. • The size of the correlation goes up as the job becomes more cognitively complex. • Even for low-skill occupations, job experience does not lead to convergence in performance among persons with different cognitive ability. • For intellectually demanding jobs, there is no point at which more cognitive ability doesn’t make a difference. Increases in IQ scores are statistically associated with increases in productivity at every level of cognitive ability.”

“Non-Latino Latino White 60.0% 12.1% Black 12.4% 0.4% East Asian 2.4% 0.0% South Asian 1.5% 0.0% Filipino/Pacific Islander 1.1% 0.0% Native American 0.7% 0.2% Southeast Asian 0.6% 0.0% Other Asian 0.1% 0.1% Other Single Race 0.3% 4.7% White & Black 0.7% 0.1% White & Native American 0.5% 0.1% White & Asian 0.5% 0.1% Other Combination 0.8% 0.6% TOTAL 81.6% 18.4%”

“Page 42: Whatever the combination of sources of test bias might be, genuine bias against a minority will show up in a way that leaves no room for doubt: It will under-predict the test taker’s performance in the classroom or on the job. Whether predictive validity is the same for different groups can be subjected to rigorous statistical scrutiny, and it has been, repeatedly. The results are unambiguous, whether the thing being predicted is grades in school or performance on the job. The major tests do not under-predict the performance of Africans or Latins.”