In science, the control variable is the one factor in an experiment that the researcher holds steady in an effort to isolate the effect that is being studied. According to About.com, it is also sometimes referred to as t... More »

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The control variable, also known as the constant variable, is the variable that remains unchanged throughout an experiment. Control variables minimize room for errors as they reduce the factors that can affect the outcom... More »

Macroeconomic variables, or MVs, are indicators of the overall state of a country's economy. In the United States, they include the Consumer Price Index, average prime rate, Dow Jones Average and inflation rate. The gove... More »

In a scientific experiment, the controlled variable is a factor that the experimenter holds constant and does not allow to change. Other variables are changed by the participants in the study, by the experimenter or by n... More »

The dependent variable is the measurable factor that changes due to the effect of another variable in an experiment or series of measurements. It has a relationship with the independent variable, which can be positive or... More »

In a scientific experiment, a confounding variable is a secondary, changing condition that muddies the experimenter's hypothesized inference between cause and effect. Researchers must be meticulous about experiment desig... More »

A variable the researcher holds constant in an experiment is a controlled factor or constant. All variables remain constant in a controlled experiment except for the one tested and its effects. Neglecting to control all ... More »