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.

Solution Summary

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?