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Research Methodology2
Analysis of Covariance1
Analysis of Variance1
Hypothesis Testing1
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Multivariate Analysis1
Outcomes of Treatment1
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Educational and Psychological…2
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Ross, Donald C.2
Klein, Donald F.1
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Multivariate and Multigroup Theta Tests of Differential Response Patterns.
Peer reviewed Peer reviewed
Ross, Donald C. – Educational and Psychological Measurement, 1983
Theta is a statistic which measures the degree to which a designated pattern successfully partitions a matrix of pre- and post-treatment ratings into regions typical of each of two treatments. In this paper, theta is extended to multivariate and multigroup cases. (Author/BW)
Descriptors: Hypothesis Testing, Matrices, Multivariate Analysis, Research Methodology
Group Matching: Is This a Research Technique to Be Avoided?
Peer reviewed Peer reviewed
Ross, Donald C.; Klein, Donald F. – Educational and Psychological Measurement, 1988
The variance of the sample difference and the power of the "F" test for mean differences were studied under group matching on covariates and also under random assignment. Results shed light on systematic assignment procedures advocated to provide more precise estimates of treatment effects than simple random assignment. (TJH)
Descriptors: Analysis of Covariance, Analysis of Variance, Monte Carlo Methods, Outcomes of Treatment