Correlation and Causation

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What Is Correlation?
Correlation and Causation
Murder rates affect IQ tests scores: study Murder rates affect IQ tests scores: study By Maggie Fox, Health and Science Editor WASHINGTON Mon Jun 14, 2010 5:36pm EDT WASHINGTON (Reuters) - A murder in the neighborhood can significantly knock down a child's score on an IQ test, even if the child did not directly witness the killing or know the victim, U.S. researchers reported on Monday. The findings have implications both for crime control efforts and for the heavy reliance on standardized tests, said New York University sociology professor Patrick Sharkey, who conducted the study. They can also explain about half the achievement gap between blacks and whites on such tests, he reported in the Proceedings of the National Academy of Sciences.
Straight A's in High School May Mean Better Health Later in Life
Happiness wards off heart disease, study suggests Happiness wards off heart disease, study suggests Being happy and staying positive may help ward off heart disease, a study suggests. US researchers monitored the health of 1,700 people over 10 years, finding the most anxious and depressed were at the highest risk of the disease. They could not categorically prove happiness was protective, but said people should try to enjoy themselves. But experts suggested the findings may be of limited use as an individual's approach to life was often ingrained. At the start of the study, which was published in the European Heart Journal, participants were assessed for emotions ranging from hostility and anxiousness to joy, enthusiasm and contentment. They were given a rating on a five-point scale to score their level of positive emotions.
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