Testing the difference between two alpha coefficients with small samples of subjects and raters

Educational and Psychological Measurement

Volumn 66, Issue 4, 2006, Pages 589-600

  Feldt, Leonard S ^a   Kim, Seonghoon ^b  

^a UNIVERSITY OF IOWA   (United States)

^b ACT INC   (United States)

Author keywords

Cronbach's coefficient alpha; Difference in reliability estimates; Reliability; Small samples

Indexed keywords

EID: 33745965825     PISSN: 00131644     EISSN: 15523888     Source Type: Journal    
DOI: 10.1177/0013164405282488     Document Type: Article

References (16)

1. Alsawalmeh, Y. M., & Feldt, L. S. (1999). Testing the equality of independentalpha coefficients adjusted for test length. Educational and Psychological Measurement, 59, 373 - 383.
2. Brennan, R. L. (2001). Generalizability theory. New York: Springer.
3. Cook, D. L. (1959). A replication of Lord's study of skewness and kurtosis of observed test-score distributions. Educational and Psychological Measurement, 19, 81 - 87.
4. Cronbach, L. J. (1990). Essentials of psychological testing (5th ed.). New York: Harper & Row.
5. Feldt, L. S. (1965). The approximate sampling distribution of Kuder-Richardson reliability coefficient twenty. Psychometrika, 30, 357 - 370.
6. Feldt, L. 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.
7. Feldt, L. S., & Ankenmann, R. D. (1998). Appropriate sample size for comparing alpha reliabilities. Applied Psychological Measurement, 22, 170 - 178.
8. Feldt, L. S., & Ankenmann, R. D. (1999). Determining sample sizes for a test of equality of alpha coefficients when the number of part-tests is small. Psychological Methods, 4, 366 - 377.
9. Feldt, L. S., & Qualls, A. L. (1996). Bias in coefficient alpha arising from heterogeneity of test content. Applied Measurement in Education, 9, 277 - 286.
10. Jöreskog, K., & Sörbom, D. (1996). LISREL 8: User's reference guide. Chicago: Scientific Software International.
11. Kendall, M., & Stuart, A. (1977). The advancedtheory of statistics (4th ed., Vol. 1). New York: Macmillan.
12. Lee, G., Dunbar, S. B., & Frisbie, D. A. (2001). The relative appropriateness of eight measurement models for analyzing scores from tests composed of testlets. Educational and Psychological Measurement, 61, 958 - 975.
13. Lord, F. M. (1955). A survey of observed test-score distributions with respect to skewness and kurtosis. Educational and Psychological Measurement, 15, 383 - 389.
14. Novick, M. R., & Lewis, C. (1967). Coefficient alpha and the reliability of composite measurements. Psychometrika, 32, 1 - 13.
15. Odell, P. L., & Feiveson, A. H. (1966). A numerical procedure to generate a sample covariance matrix. Journal of the American Statistical Association, 61, 199-203.
16. Schumann, D. E. W., & Bradley, R. A. (1957). The comparison of the sensitivities of similar experiments: Theory. Annals of Mathematical Statistics, 28, 902 - 920.