controlledtest
nounUK /kənˈtrəʊld tɛst/
US /kənˈtroʊld tɛst/
A controlled test is a test where you keep everything the same except the one thing you are checking.
The scientist did a controlled test to see if the plant grew faster with more light.
RELATED WORDS
OTHER MEANINGS
2. A test run under fixed, monitored conditions to check a machine or system.
Engineers ran a controlled test of the new brakes on the track.
3. An exam given under strict supervision to prevent cheating.
Students took a controlled test in the main hall with invigilators present.
4. A trial where only one factor is changed to measure its effect.
The controlled test showed that the new medicine worked better than the old one.