Nonequivalent Group Designs

Charles S. Reichardt, Melvin Michael Mark

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The nonequivalent group design is a quasiexperiment that draws comparisons among groups of participants who are assigned to different treatments in a nonrandom fashion. Selection differences are likely to bias the estimates of the treatment effects. Analysis strategies and design features for taking account of this bias are described. These analysis strategies and design features impose different assumptions about the nature of selection. Unfortunately, researchers will seldom have enough information to know which set of assumptions is correct in any given situation. In general, the recommended approach is to minimize the bias as much as possible by making the nonequivalent groups as similar as possible.

Original languageEnglish (US)
Title of host publicationInternational Encyclopedia of the Social & Behavioral Sciences: Second Edition
PublisherElsevier Inc.
Pages851-855
Number of pages5
ISBN (Electronic)9780080970875
ISBN (Print)9780080970868
DOIs
StatePublished - Mar 26 2015

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Reichardt, C. S., & Mark, M. M. (2015). Nonequivalent Group Designs. In International Encyclopedia of the Social & Behavioral Sciences: Second Edition (pp. 851-855). Elsevier Inc.. https://doi.org/10.1016/B978-0-08-097086-8.44039-0
Reichardt, Charles S. ; Mark, Melvin Michael. / Nonequivalent Group Designs. International Encyclopedia of the Social & Behavioral Sciences: Second Edition. Elsevier Inc., 2015. pp. 851-855
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Reichardt, CS & Mark, MM 2015, Nonequivalent Group Designs. in International Encyclopedia of the Social & Behavioral Sciences: Second Edition. Elsevier Inc., pp. 851-855. https://doi.org/10.1016/B978-0-08-097086-8.44039-0

Nonequivalent Group Designs. / Reichardt, Charles S.; Mark, Melvin Michael.

International Encyclopedia of the Social & Behavioral Sciences: Second Edition. Elsevier Inc., 2015. p. 851-855.

Research output: Chapter in Book/Report/Conference proceedingChapter

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Reichardt CS, Mark MM. Nonequivalent Group Designs. In International Encyclopedia of the Social & Behavioral Sciences: Second Edition. Elsevier Inc. 2015. p. 851-855 https://doi.org/10.1016/B978-0-08-097086-8.44039-0