Discussion
A variable used to cause a change in another variable is known as :
Answer: C
A variable used to cause a change in another variable is an independent variable.
In an experiment the researcher manipulates or selects the independent variable (the presumed cause) and observes its effect on the dependent variable (the outcome). For example, in a study of whether a reading programme improves library use, the programme is the independent variable and library use the dependent one.
The dependent variable is the one that changes, not the one that causes change. An extraneous variable is an outside influence that the researcher tries to control because it could distort the result. A discontinuous (discrete) variable takes separate values and describes the type of measurement, not a variable's role in cause and effect.
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