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- W194857102 abstract "The use of stepwise methodologies has been sharply criticized by several researchers, yet their popularity, especially in educational and psychological research, continues unabated. Stepwise methods have been considered particularly well suited for use in regression and discriminant analyses, but their use in discriminant analysis (predictive discriminant analysis and descriptive discriminant analysis) has not been the direct focus of as much written commentary. This discussion considers several problems associated with the use of stepwise methods. These include: (1) incorrect degrees of freedom associated calculated by computer packages; (2) sampling error capitalization; and (3) failure to select the best subset of predictors. Although they offer the promise of assisting researchers with tasks such as variable selection and variable ordering, this promise is almost always unfulfilled. Some alternatives to the use of stepwise methods are discussed, including manually correcting degrees of freedom, crossvalidation procedures, and allpossible subsets analyses. (Contains 6 tables and 45 references.) (Author/SLD) *********************************************************************** Reproductions supplied by EDRS are the best that can be made from the original document. *********************************************************************** Stepwise Methodology 1 Running head: STEPWISE METHODOLOGY USE IN DISCRIMINANT ANALYSIS U.S. DEPARTMENT OF EDUCATION Office of Educational Research and Improvement EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) his document has been reproduced as received from the person or organization originating it. Minor changes have been made to improve reproduction quality. Points of view or opinions stated in this document do not necessarily represent official OERI position or policy. PERMISSION TO REPRODUCE AND DISSEMINATE THIS MATERIAL HAS BEEN GRANTED BY '3-676Ai WHirnk TO THE EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) Use of Stepwise Methodology in Discriminant Analysis Jean S. Whitaker Texas A&M University 77843-4225" @default.
- W194857102 created "2016-06-24" @default.
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- W194857102 date "1997-01-23" @default.
- W194857102 modified "2023-09-24" @default.
- W194857102 title "Use of Stepwise Methodology in Discriminant Analysis." @default.
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