Health Services Research (HSR) Methods
Print Page

One Group Pretest Posttest
Synonyms: Before and After Design; One Group Before and After Design

A study design in which a sample is observed twice, one prior to (pre), and once after (post) 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.