independent variable

Related Terms
A factor or phenomenon that causes or influences another associated factor or phenomenon called a dependent variable.

For example, income is an independent variable because it causes and influences another variable consumption. In a mathematical equation or model, the independent variable is the variable whose value is given. In an experiment, it is the controlled condition (that is allowed to change in a systematic manner) whose effect on the behavior of a dependent variable is studied. Also called controlled variable, explanatory variable, or predictor variable.

Use 'independent variable' in a Sentence

Working in a garden, the amount of compost used in an area is a controlled or independent variable, and the resulting plant growth is an outcome or dependent variable.
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In an experiment you had better control all the independent variable as best you can otherwise your experiment might produce confusing and unintended results.
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The independent variable in a psychology research project is frequently found to have effects not originally expected by the researchers.
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