ERIC Number: ED470205
Record Type: Non-Journal
Publication Date: 2002-Aug
Reference Count: N/A
Multiple Regression Assumptions. ERIC Digest.
Osborne, Jason W.; Waters, Elaine
This Digest presents a discussion of the assumptions of multiple regression that is tailored to the practicing researcher. The focus is on the assumptions of multiple regression that are not robust to violation, and that researchers can deal with if violated. Assumptions of normality, linearity, reliability of measurement, and homoscedasticity are considered. Checking these assumptions carries significant benefits for the researcher, and making sure an analysis meets the associated assumptions helps avoid Type I and II errors. Attending to such issues as attenuation due to low reliability, curvilinearity, and nonnormality often boosts effect sizes, usually a desirable outcome. There are many nonparametric statistical techniques available to researchers when the assumptions of a parametric statistical technique are not met. These are often somewhat lower in power than parametric techniques, but they provide valuable alternatives for researchers. (SLD)
ERIC Clearinghouse on Assessment and Evaluation, 1129 Shriver Laboratory, University of Maryland, College Park, MD 20742. Tel: 800-464-3742 (Toll Free); Web site: http://ericae.net.
Publication Type: ERIC Publications; ERIC Digests in Full Text
Education Level: N/A
Sponsor: Office of Educational Research and Improvement (ED), Washington, DC.
Authoring Institution: ERIC Clearinghouse on Assessment and Evaluation, College Park, MD.