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Longman Dictionary of Contemporary English
controlled experiment
noun
EXAMPLES FROM CORPUS
▪ This has not yet been measured by a properly controlled experiment.
▪ Two of the four specimens known to be infected with M tuberculosis were positive in the controlled experiment.
Wikipedia
Controlled Experiment

"Controlled Experiment" is an episode of the original The Outer Limits television show. It first aired on 13 January 1964, during the first season.

Usage examples of "controlled experiment".

It seems like a perfectly controlled experiment in the evolution of human societies.

Hair took his figures to Mallory, pointed out the political dangers of failure if ACCED was continued on its present scale, recommended cutting it back sharply to the level of a controlled experiment until Curtice's group was able to show that the current stages of their work would not bog down in the same type of problems as the first had done.

A plant-run controlled experiment in eugenic horror on an alien planetthat was the simplest explanation?

They need a full-scale, controlled experiment to convince them of the potential of this technology.

It wasn't wrong to need two hundred dollars or to participate in a controlled experiment, anymore than it was wrong to want to be free.

Thus, a controlled experiment showed that I/we were right about the primitives and their religion.