Simplifying Random Assignment with The Cambridge Randomizer

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The Cambridge Randomizer offers a cost-effective and efficient solution for random assignment in research studies, enabling treatment providers to conduct the process securely. This innovative online portal streamlines the assessment of participant eligibility, provides instant baseline data, and ensures immediate random allocation into treatment and control groups. Researchers retain control over the scientific process while quantitative and qualitative data can be easily managed. With features like secure log-in and automated reporting, the Cambridge Randomizer simplifies random assignment without compromising research integrity.


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  1. The Cambridge Randomizer Sycamore Tree Programme Evaluation

  2. The Problem: In carefully designed experiments, random assignment (RA) procedures can be quite expensive, time-consuming and difficult to manage RA is usually carried out by the research team, not the treatment-provider, in order to increase the likelihood that the integrity of the research will not be challenged. Can treatment providers conduct the RA themselves, without jeopardizing the integrity of the RCT?

  3. The Cambridge Randomizer A low-cost, secure and user-friendly online portal for RA Treatment-providers can now conduct the RA themselves : 1. Secure log-in (meets data protection demands) 2. Assess eligibility of cases to participate in the RCT 3. provide instantaneous baseline information for each case Immediate random llocation into treatment and control groups. The Randomizer automatically sends an electronic report to the research team with each case that goes through the pipeline Researchers maintain control over the scientific process Both quantitative and qualitative data can be accommodated.

  4. Random Assignment Without Tears

  5. Ariel, Barak, Lawrence Sherman and Jordi Vila (forthcoming?). Random Assignment without Tears: How to Stop Worrying and Love the Cambridge Randomizer. Journal of Experimental Criminology ba285@cam.ac.uk Sycamore Tree Programme Evaluation

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