[Answer] controlled experiment

Answer: is an experiment when one varible changes, manipulated variable changes one
at a time
controlled experiment
A controlled experiment is simply an experiment in which all factors are held constant except for one: the independent variable. A common type of controlled experiment compares a control group against an experimental group. All variables are identical between the two groups except for the factor being tested.
A controlled experiment is a scientific test done under controlled conditions meaning that just one (or a few) factors are changed at a time while all others are kept constant. We’ll look closely at controlled experiments in the next section.
In a controlled experiment an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.
Controlled experiment definition is – an experiment in which all the variable factors in an experimental group and a comparison control group are kept the same except for…

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