Why do you need an independent variable in an experiment?



  1. 0 Votes

    In an experiemnt, the independent variable is the variable being changed, and the dependent variable is the variable being held constant. If we did not change anything in an experiment and held everything constant, t would not be an experiment at all, more like an observation.


    The scientific method also state you must have a hypothesis to have an experiment. A hypothesis is an If…then statement, meaning an action must be taken in order to test the hypothesis (ex: manipulation of some independent variable).

  2. 0 Votes

    You need an independent variable because of what it is. The independent variable is the variable that is manipulated to find an effect in the dependent variable. For example, if you were testing a drug to see if it could treat depression, the drug would be the independent variable and the effect on the patient (whether or not it made depression scores change) would be the dependent variable. 

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