Answer:
True
Step-by-step explanation:
Controlled experiment: In psychological research, a controlled experiment is referred to as scientific research or test that is being directly manipulated through the researcher, scientists, or experimenter to measure a particular variable at a time. In a controlled experiment, the variable that is being tested or measured is an independent variable and therefore it is being adjusted to know its effects on the specific system which is being studied.
In the question above, the given statement is true.