Health Services Research (HSR) Methods
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Reliability Coefficient
Synonyms: Reliability
Related Terms: Reliability; Within Subject Design; Kendall's Tau; Cronbach's Alpha

Statistic used to measure the consistency of a test or observations. The reliability coefficient is calculated by measuring the correlation between repeated observations on the same subjects.

Reliability coefficients range from -1 to 0 to +1.

Further Reading
Last, J. 1983. A Dictionary of Epidemiology, New York, NY: Oxford Medical Publications.

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