A factor other than the independent variable that might produce an effect in an experiment.

A factor other than the independent variable that might produce an effect in an experiment.

• A. Confounding variable
• B. Dependent variable
• C. Control
• D. Random variable

Answer: (A)

In experiments, factors other than the one you deliberately manipulate that could influence the outcome are called confounding variables. They threaten your ability to conclude that the observed effect came from the independent variable because they offer an alternative explanation for the results. For example, if you test a learning method but students come from different prior knowledge levels, that prior knowledge could drive differences you attribute to the method. The dependent variable is simply what you measure, the outcome, not a potential cause. A control is a baseline condition used for comparison to isolate the effect of the manipulation. A random variable refers to unpredictable variation that randomization helps distribute, but isn’t the specific term for a factor that could produce an effect beside the manipulation. Therefore, the best term for a factor other than the independent variable that might produce an effect is confounding variable.

In experiments, factors other than the one you deliberately manipulate that could influence the outcome are called confounding variables. They threaten your ability to conclude that the observed effect came from the independent variable because they offer an alternative explanation for the results. For example, if you test a learning method but students come from different prior knowledge levels, that prior knowledge could drive differences you attribute to the method. The dependent variable is simply what you measure, the outcome, not a potential cause. A control is a baseline condition used for comparison to isolate the effect of the manipulation. A random variable refers to unpredictable variation that randomization helps distribute, but isn’t the specific term for a factor that could produce an effect beside the manipulation. Therefore, the best term for a factor other than the independent variable that might produce an effect is confounding variable.