skip navigation

CrimeSolutions.gov

Add your conference to our Justice Events calendar

PUBLICATIONS

Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Library collection. To conduct further searches of the collection, visit the NCJRS Abstracts Database. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

 
  NCJ Number: NCJ 241818    
  Title: Half Century of Randomized Experiments on Crime and Justice (From Crime and Justice: A Review of Research, Volume 34, P 55-132, 2006, Michael Tonry, ed. - See NCJ-241816)
  Author(s): David P. Farrington ; Brandon C. Welsh
  Date Published: 2006
  Page Count: 78
  Annotation: This essay summarizes the first half century of criminological experiments.
  Abstract: The number of randomized experiments on crime and justice with a minimum of 100 participants more than doubled between 1957 and 1981, when there were 37, and between 1982 and 2004, when there were 85. There was an increase in very large, multisite replication experiments and in experiments in which the unit of randomization was the area. Results in the second period were generally more encouraging, showing that some interventions reduced offending. The main advantage of a randomized experiment is its high internal validity. Randomization ensures that the average person or place in one condition is equivalent on all measured and unmeasured variables to the average in another condition, within the limits of statistical fluctuation. Observed differences in outcomes can be attributed to differences in interventions rather than to pre-existing differences. Randomized experiments have formidable practical and ethical problems but are often feasible and should be used to test causal hypotheses and evaluate well-defined technologies wherever possible. (Published Abstract)
  Main Term(s): Criminology
  Index Term(s): Research methods ; Research design ; Research uses in policymaking ; Corrections research ; Criminal justice research ; Criminal justice system effectiveness
  Sale Source: University of Chicago Press
1427 East 60th Street
Chicago, IL 60637
United States of America
  Publisher URL: http://www.press.uchicago.edu 
  Type: Historical Overview ; Literature Review
  Country: United States of America
  Language: English
   
  To cite this abstract, use the following link:
https://www.ncjrs.gov/App/Publications/abstract.aspx?ID=263979

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.