This paper reviews and illustrates statistical tests of the equality of two values of Cronbach's alpha reliability coefficient. Tests for independent and dependent coefficients are considered. Possible pitfalls in determining the critical value for these tests or in computing the p value associated with the tests' outcome are discussed.
Get full access to this article
View all access options for this article.
References
1.
FeldtL. S. (1965) The approximate sampling distribution of Kuder-Richardson reliability coefficient twenty. Psychometrika, 30, 357–373.
2.
FeldtL. S. (1969) A test of the hypothesis that Cronbach's alpha or Kuder-Richardson coefficient twenty is the same for two tests. Psychometrika, 34, 363–373.
3.
FeldtL. S. (1980) A test of the hypothesis that Cronbach's alpha reliability coefficient is the same for two tests administered to the same sample. Psychometrika, 45, 99–105.
4.
KristofW. (1963) The statistical theory of stepped-up reliability coefficients when a test has been divided into several equivalent parts. Psychometrika, 28, 221–238.
