Experimental manipulation describes the process by which researchers purposefully change, alter, or influence the independent variables (IVs), which are also called treatment variables or factors, in an experimental research design.

What is manipulated in experimental?

A manipulated variable is the independent variable in an experiment. It's called “manipulated” because it's the one you can change. In other words, you can decide ahead of time to increase it or decrease it. ... The manipulated variable is the independent variable in an experiment.

What is the condition that is manipulated by the experimenter?

The variable that is manipulated by the experimenter is called the independent variable (IV); it is free (independent) to be varied by the experimenter. What is being measured is called the dependent variable (DV); it “depends” on the manipulation of the independent variable.