Health Services Research (HSR) Methods
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Pretest-Posttest Control Group Design
Synonyms: Randomized Two-Group Pretest-Posttest Only Design

A study design in which subjects are assigned to either a study or a control group. The study group experiences an intervention or experiment while the control group does not. Both groups are observed at two points in time, before and after an intervention or experiment.


Further Reading
Marczyk, G.R. et al. 2005. Essentials of Research Design and Methodology, Hoboken, NJ: John Wiley & Sons.

Campbell, D. and J. Stanley. 1963. Experimental and Quasi-Experimental Designs for Research, Boston, MA: Houghton Mifflin Company.

Shi, L. 1997. Health Service Research Methods, Albany, NY: Delmar Publishers.