Which of the following is the variable that is purposely manipulated in an experiment?
dependent variable
controlled variable
independent variable
responding variable
The independent variable is the variable that is purposely manipulated in an experiment.
The variable that is purposely manipulated in an experiment is called the independent variable.
The variable that is purposely manipulated in an experiment is called the independent variable. To determine the independent variable in an experiment, you need to identify the factor that is intentionally changed or adjusted by the researcher. This variable is carefully controlled and varied to study its effect on the dependent variable, which is the variable being measured or observed as a result of the changes made to the independent variable.
For example, let's consider an experiment investigating the effect of different amounts of fertilizer on plant growth. In this case, the amount of fertilizer would be the independent variable because it is intentionally manipulated by the researcher. The dependent variable would be the plant growth, as it is the variable that is observed or measured as a result of the various amounts of fertilizer applied.