Correlation (Psychology)

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  • A statistical tool used to measure the strength and the direction of a linear relationship between two variables. Correlations are expressed in numerical terms using correlation coefficients that range from −1.0 to +1.0. Two variables are positively correlated when they simultaneously increase or decrease in the same direction. On the other hand, two variables are negatively correlated when they simultaneously increase or decrease in different directions. The higher the correlation, the stronger the relationship is between the two variables, regardless of whether that relationship is positive or negative. The Pearson product moment correlation coefficient is the best-known correlation coefficient.

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