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Showing posts with the label “human traits”

Nature vs. Nurture

For those who always resign and blame 'human nature' whether it is the cause of wars, violence or obscene inequality and 'greed'. ************* A 2015 comprehensive meta-analysis of more than 2,500 twin studies between 1958 and 2012, covering almost 18,000 complex human traits, found (unsurprisingly) that identical twins are typically more similar than fraternal twins. But their personalities are certainly not identical. For the 568 traits that were descriptions of temperament or personality, the study found that 47% of differences could be attributed to genetic differences. The remaining portion, it concluded, must be accounted for by environmental influences. Other studies   seem to support this  – only around 40-50% of personality differences are genetic. But even when combining a range of different DNA variants, the effects on personality remain smaller than anticipated. Heritability estimates currently span  from 9% to 18%  for Big Five personalit...