Health Services Research (HSR) Methods
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Correlation Coefficient
Related Terms: Association; Correlation; Pearson's R

Measure of the degree to which two variables are associated, based on the degree of their linear relationship. Correlation measures range between -1.0 and +1.0, where each extreme represents a perfect linear relationship and 0 represents no relationship.

A correlation coefficient equal to 0 means there is no linear relationship between the variables.


Further Reading
Gliner, J.A. and G.A. Morgan. 2000. Research Methods in Applied Settings, Mahwah, NJ: Lawrence Erlbaum Associates.

University of Glasgow. Statistics Glossary. Available at http://www.stats.gla.ac.uk/steps/glossary/alphabet.html .