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en.wikipedia.org/wiki/Randomized_controlled_trial

A randomized controlled trial is a type of scientific (often medical) experiment which aims to ..... Some examples of scientific organizations' considering RCTs or systematic reviews of RCTs to be the highest-quality evidence available are:.

explorable.com/randomization

Randomization is a method used in sampling and assignment of sample groups in experiments and scientific research.

www.ebbp.org/course_outlines/randomized_controlled_trials

The most common use for RCTs in the behavioral and social sciences is to examine .... External validity can be enhanced by having the study sample include ...

www.ncbi.nlm.nih.gov/pmc/articles/PMC3196997

Sep 30, 2011 ... Part 17 of a Series on Evaluation of Scientific Publications ... In clinical research, randomized controlled trials (RCTs) are the best way to ... (Sample size calculation is described in detail in a previous article in this series [17].).

himmelfarb.gwu.edu/tutorials/studydesign101/rcts.html

An RCT should be a study of one population only. ... The study done in this example was to determine whether the early use of bed nets had an effect on the  ...

www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0025811

Randomized Control Trial (RCT) ... one of the most important developments of modern medical science: they refined the methods for testing ... groups are not different from the start — for example, because one group has healthier people in it.

www.p12.nysed.gov/assessment/hsgen/611/rct/333rs-611.pdf

The Regents Competency Test (RCT) in Science ... editions of the RCT in Science were administered in .... directions, the sample question, and how to mark.

adc.bmj.com/content/90/8/840

The randomised controlled trial (RCT) is considered to provide the most ... A sample of the population of interest is randomly allocated to one or another ..... An RCT is the most rigorous scientific method for evaluating the effectiveness of health ...

citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.566.7329&rep=rep1&type=pdf

sample size(1). Another major reason, besides the scientific justification for doing a study, why a researcher wants an estimate of the sample size is to calculate ...