This brief article seeks to answer, with examples, some of the more common questions that policy‐makers and practitioners in children's services often ask about randomised controlled trials (RCTs). It is essentially a primer, and those wishing to read further on these issues might find it helpful to start with the books discussed in the review article by Hobbs and colleagues in this special edition (p40).
Dynarski, M. and Grosso, P. (2008), "Random assignment in programme evaluation and intervention research: questions and answers", Journal of Children's Services, Vol. 3 No. 1, pp. 9-13. https://doi.org/10.1108/17466660200800002
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