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Analysis of Covariance2
Analysis of Variance2
Statistical Inference2
Correlation1
Equations (Mathematics)1
Hypothesis Testing1
Mathematical Models1
Power (Statistics)1
Pretests Posttests1
Research Design1
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Psychometrika2
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Davison, Mark L.1
Hakstian, A. Ralph1
Sharma, Anu R.1
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ANOVA and ANCOVA of Pre- and Post-Test, Ordinal Data.
Peer reviewed Peer reviewed
Davison, Mark L.; Sharma, Anu R. – Psychometrika, 1994
Three analyses of pretest and posttest data are considered: (1) posttest only designs; (2) two-way repeated measures of analysis of variance (ANOVA); and (3) one-way analysis of covariance (ANCOVA). Conditions that ensure legitimacy of inferences about the equality of treatment effects on the latent variable theta are discussed. (SLD)
Descriptors: Analysis of Covariance, Analysis of Variance, Pretests Posttests, Research Design
Inferential Theory for Partially Disattenuated Correlation Coefficients.
Peer reviewed Peer reviewed
Hakstian, A. Ralph; And Others – Psychometrika, 1989
Four measurement designs are presented for use with correlation coefficients corrected, in one variable, for attenuation due to unreliability (partially disattenuated). Associated asymptotic variance/covariance expressions are presented. Empirical simulation results illustrate the satisfactory Type I error control and statistical power of the…
Descriptors: Analysis of Covariance, Analysis of Variance, Correlation, Equations (Mathematics)