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Correlation in studies

Could you tell me if the correlation is positive or negative as well as finding giving a plausible explanation on why studies shown that the longer people are married, the more similar their political and social views become?
Two, have shown that the longer children had lived in an orphanage, the lower their IQ scores are.
Three, has studies shown that in large American cities, there is a relationship between number of violent crimes and the number of stores that sell violence-depicting pornography.

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Why studies shown that the longer people are married, the more similar their political and social views become:

For this one, this is a positive correlation between the longevity of the marriage and the similarity of political and social views between the married couple. One of the reasons this could be true is that when people are married, they spend a lot of time together and usually join in on similar activities. This may include political and social ...

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Could you tell me if the correlation is positive or negative as well as finding giving a plausible explanation on why studies shown that the longer people are married, the more similar their political and social views become?

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