Control variable

A factor kept constant so that it does not affect the comparison between results.

A factor kept the same so that it does not provide another explanation for a change in the result.

A factor kept the same so that it does not provide another explanation for a difference in results.

A factor kept constant so that it does not provide an alternative explanation for the results.

A variable kept the same between measurements so that its effect does not obscure the effect being investigated.

A factor kept constant so that it does not affect the result.

A factor kept the same so that a change in the measured outcome can be linked fairly to the independent variable.

A variable kept constant so that it does not affect the outcome of an investigation.

A factor kept the same so that a comparison between experimental groups is valid.

A factor, other than the independent variable, that could affect the dependent variable and is therefore kept constant or otherwise managed.