controlled experiment

an experiment or trial that uses controls, usually separating the subjects into one or more control groups and experimental groups. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To controlled experiment's 21st Century Lexicon
Main Entry:  controlled experiment
Part of Speech:  n
Definition:  a trial or experiment that includes a control (comparison) group; also called controlled study; any trial or test of a hypothesis under carefully managed conditions's 21st Century Lexicon
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Example sentences
Maybe my life is some sort of controlled experiment.
It was also the only controlled experiment that imposed a specific change of
  environment and watched what happened.
But the question has not been investigated in detail, partly due to the
  difficulty of designing a controlled experiment.
It should be noted that this is not a controlled experiment, but rather a case
  study of two bears in one zoo.
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