Reliability Coefficient

¢  A correlation coefficient that indicates the degree of relationship between two sets of scores intended to be measures of the same characteristic.
¢  (E.g., Correlation between scores assigned by two different raters or scores obtained from administration of two forms of a test.)
¢  Reliability coefficients of .60 are appropriate for screening purposes.
¢  Tests are usually considered highly reliable if they reach a coefficient of .90.