Show Summary Details

Page of

PRINTED FROM the Encyclopedia of Social Work, accessed online. (c) National Association of Social Workers and Oxford University Press USA, 2020. All Rights Reserved. Under the terms of the applicable license agreement governing use of the Encyclopedia of Social Work accessed online, an authorized individual user may print out a PDF of a single article for personal use, only (for details see Privacy Policy and Legal Notice).

date: 29 October 2020

Experimental and Quasi- Experimental Designlocked

  • Charles L. UsherCharles L. UsherUniversity of North Carolina at Chapel Hill, Emeritus

Summary

Experimental and quasi-experimental research provides the foundation for all evidence-based practice systems that seek to identify and promote the use of social work practices of demonstrated effectiveness. This reflects the prevailing perspective that experimental research is the only definitive basis for claims that certain outcomes can be altered by the effects of a given intervention. At this point in the evolution of social work research, however, the body of work based on experimentation is not extensive. In response to the challenges of implementing experiments related to social interventions, researchers have developed new approaches, such as group randomized designs. Also, newly developed statistical methods may provide ways to control the selection bias inherent in quasi-experimental designs. This entry explores the central place of experimental and quasi-experimental designs in social work research, the challenges of using them, and recent developments that may expand their use.

Subjects

  • Social Work Research and Evidence-based Practice

You do not currently have access to this article

Login

Please login to access the full content.

Subscribe

Access to the full content requires a subscription