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Probing Interactions in Fixed and Multilevel Regression: Inferential and Graphical Techniques
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Bauer, Daniel J.; Curran, Patrick J. – Multivariate Behavioral Research, 2005
Many important research hypotheses concern conditional relations in which the effect of one predictor varies with the value of another. Such relations are commonly evaluated as multiplicative interactions and can be tested in both fixed-and random-effects regression. Often, these interactive effects must be further probed to fully explicate the…
Descriptors: Research Methodology, Predictor Variables, Hypothesis Testing, Methods Research
The Tabu Search Procedure: An Alternative to the Variable Selection Methods
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Mills, Jamie, D.; Olejnik, Stephen, F.; Marcoulides, George, A. – Multivariate Behavioral Research, 2005
The effectiveness of the Tabu variable selection algorithm, to identify predictor variables related to a criterion variable, is compared with the stepwise variable selection method and the all possible regression approach. Considering results obtained from previous research, Tabu is more successful in identifying relevant variables than the…
Descriptors: Predictor Variables, Multiple Regression Analysis, Behavioral Science Research, Evaluation Criteria