Chapter 6 – Correlational ResearchSummaryCorrelational research is used to describe the relationship between two variables. A correlation coefficient ( r ) indicates both the direction and magnitude of the relationship. If the scores on the two variables tend to increase and decrease together, the variables are positively correlated. If the scores vary inversely, the variables are negatively correlated. The magnitude of a correlation coefficient indicates the strength of the relationship between the variables. A correlation of zero indicates that the variables are not related; a correlation of +/- 1.00 indicates that they are perfectly related. The square of the correlation coefficient, the coefficient of determination ( r ^2), reflects the proportion of the total variance in one variable that can be accounted for by the other variable.Researchers test the statistical significance of correlation coefficients to gauge the
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