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Define Independent Variable In An Experiment. The independent variable is the variable that can be controlled and changed. It is the presumed cause. It represents the cause or reason for an outcome. The independent variable is the variable the experimenter manipulates or changes and is assumed to have a direct effect on the dependent variable.
It represents the cause or reason for an outcome. The independent variable is the amount of nutrients added to the crop field. This variable doesnt rely on any other variables. Analyze the sample scenario. Julia wanted to test which brand of marshmallow would be best for roasting at a campfire. For example allocating participants to either drug or placebo conditions independent variable in order to measure any changes in the intensity of their anxiety dependent variable.
It refers to the condition of an experiment that is systematically manipulated by the investigator.
In an experiment you need some type of control. Being able to modify a variable is important to study the effects. As you vary your independent variable you watch what happens to your dependent variable. In an experiment you manipulate the independent variable and measure the outcome in the dependent variable. The independent variable is the variable the experimenter manipulates or changes and is assumed to have a direct effect on the dependent variable. Definitions of Control Constant Independent and Dependent Variables in a Science Experiment Sciencing The factors that can change value during an experiment or between experiments such as water temperature are called variables while those that stay the same such as acceleration due to gravity at a certain location are called constants.