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A Comparison of Tests for Equality of Two or More Independent Alpha Coefficients
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Kim, Seonghoon; Feldt, Leonard S. – Journal of Educational Measurement, 2008
This article extends the Bonett (2003a) approach to testing the equality of alpha coefficients from two independent samples to the case of m [greater than or equal] 2 independent samples. The extended Fisher-Bonett test and its competitor, the Hakstian-Whalen (1976) test, are illustrated with numerical examples of both hypothesis testing and power…
Descriptors: Tests, Comparative Analysis, Hypothesis Testing, Error of Measurement
An Investigation of Empirical Sampling Distributions of Correlation Coefficients Corrected for Attenuation
Forsyth, Robert A.; Feldt, Leonard S. – Educ Psychol Meas, 1969
Descriptors: Correlation, Hypothesis Testing, Measurement, Sampling
The Sampling Theory for the Intraclass Reliability Coefficient.
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Feldt, Leonard S. – Applied Measurement in Education, 1990
Sampling theory for the intraclass reliability coefficient, a Spearman-Brown extrapolation of alpha to a single measurement for each examinee, is less recognized and less cited than that of coefficient alpha. Techniques for constructing confidence intervals and testing hypotheses for the intraclass coefficient are presented. (SLD)
Descriptors: Hypothesis Testing, Measurement Techniques, Reliability, Sampling
A Test of the Hypothesis that Cronbach's Alpha Reliability Coefficient Is the Same for Two Tests Administered to the Same Sample.
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Feldt, Leonard S. – Psychometrika, 1980
Procedures are developed for testing the hypothesis that Cronbach's alpha reliability coefficient is equal for two tests given to the same subjects. (Author/JKS)
Descriptors: Error of Measurement, Hypothesis Testing, Measurement, Statistical Significance
A Note on the Effect of Item Difficulty Distributions on the Sampling Distribution of KR20
Nitko, Anthony J.; Feldt, Leonard S. – Amer Educ Res J, 1969
Descriptors: Difficulty Level, Factor Analysis, Hypothesis Testing, Item Analysis
Test of the Hypothesis that the Intraclass Reliability Coefficient Is the Same for Two Measurement Procedures.
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Alsawalmeh, Yousef M.; Feldt, Leonard S. – Applied Psychological Measurement, 1992
An approximate statistical test is derived for the hypothesis that the intraclass reliability coefficients associated with two measurement procedures are equal. Control of Type 1 error is investigated by comparing empirical sampling distributions of the test statistic with its derived theoretical distribution. A numerical illustration is…
Descriptors: Equations (Mathematics), Hypothesis Testing, Mathematical Models, Measurement Techniques
Analyzing Questionnaire Results: Multiple Tests of Hypotheses and Multivariate Hypotheses
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Whitney, Douglas R.; Feldt, Leonard S. – Educational and Psychological Measurement, 1973
Descriptors: Data Analysis, Hypothesis Testing, Mathematical Applications, Measurement Techniques
Estimation of the Box Correction for Degrees of Freedom from Sample Data in Randomized Block and Split-Plot Designs
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Huynh, Huynh; Feldt, Leonard S. – Journal of Educational Statistics, 1976
When the variance assumptions of a repeated measures ANOVA are not met, the F distribution of the mean square ratio should be adjusted by the sample estimate of the Box correction factor. An alternative is proposed which is shown by Monte Carlo methods to be less biased for a moderately large factor. (RC)
Descriptors: Analysis of Variance, Computer Programs, Hypothesis Testing, Matrices
Testing the Difference between Two Alpha Coefficients with Small Samples of Subjects and Raters
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Feldt, Leonard S.; Kim, Seonghoon – Educational and Psychological Measurement, 2006
Researchers sometimes need a statistical test of the hypothesis that two values of Cronbach's alpha reliability coefficient are equal. The situation may involve scores from two different measures administered to independent random samples or from the same measure administered to random samples from two different populations. Feldt derived a test…
Descriptors: Individual Testing, Test Items, Sample Size, Scores
Tests for Equality of Several Alpha Coefficients When Their Sample Estimates Are Dependent.
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Woodruff, David J.; Feldt, Leonard S. – Psychometrika, 1986
This paper presents 11 statistical procedures which test the equality of m coefficient alphas when the sample alpha coefficients are dependent. Several of the procedures are derived in detail, and numerical examples are given for two. (Author/LMO)
Descriptors: Analysis of Covariance, Analysis of Variance, Computer Simulation, Hypothesis Testing