controlled experiment
noun
plural controlled experiments
: an experiment in which all the variable factors in an experimental group and a comparison control group are kept the same except for one variable factor in the experimental group that is changed or altered
… few controlled experiments have been formally conducted by an impartial organization to prove or disprove the claims.—Noel Vietmeyer
In the next few years, non-university researchers will run controlled experiments with the fungi on mosquitoes in Africa and locusts in China.—Carrie Wells
… Bat Conservation International conducted a controlled experiment in which some of the turbines were temporarily shut down during specific wind conditions.—Kirk Swauger
compare control experiment
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Merriam-Webster unabridged
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