An experimental variable is something that a scientist changes during the course of an experiment. It is distinguished from a controlled variable, which could theoretically change, but the scientists keep constant. More »

In experimental research, researchers use controllable variables to see if manipulation of these variables has an effect on the experiment's outcome. Additionally, subjects of the experimental research are randomly assig... More »

The experimental method has a number of known weaknesses which include its creation of manufactured situations, its inability to control all variables, and its susceptibility to human error. In some situations, the exper... More »

A controlled variable is the element or feature that cannot be changed during the course of an experiment. The controlled variable is kept constant so the changes in other variables can be observed more easily. According... More »

A manipulated variable is a facet of an experiment that researchers or scientists change in order to see how the outcome of the experiment changes. The manipulated variable is also called the independent variable, and it... More »

To solve an algebra problem, identify the variable for which you are solving, isolate the terms containing that variable, and then solve the equation by isolating the variable itself. Check your work by plugging your ans... More »

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A mediating variable is a variable that accounts for the relationship between a predictor variable and an outcome variable. Mediator variables explain why or how an effect or relationship between variables occurs. More »