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Data Interpretation2
Regression (Statistics)2
Analysis of Covariance1
Data Analysis1
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Measurement and Evaluation in…2
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Schafer, William D.2
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Reporting Nonhierarchical Regression Results.
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Schafer, William D. – Measurement and Evaluation in Counseling and Development, 1992
Discusses problems researchers face when they want to describe relationship between several predictors and criterion variable. Considers ways of addressing problem of contribution of each predictor depending on which other predictors are in regression equation. Focuses on parallel information for each variable, examining initial and final…
Descriptors: Data Analysis, Data Interpretation, Regression (Statistics), Research Problems
Graphical Description of Interaction Outcomes for Regressions with Groups.
Peer reviewed Peer reviewed
Schafer, William D. – Measurement and Evaluation in Counseling and Development, 1992
Notes that presence of heterogeneous regression slopes in an analysis of covariance design is equivalent to presence of interaction in randomized-blocks design. Describes modification of the usual graphical representation of heterogeneous regressions that can aid in interpreting significant regions for regression surfaces. (NB)
Descriptors: Analysis of Covariance, Data Interpretation, Graphs, Regression (Statistics)