![]() ![]() They are observed as they naturally occur and then associations between variables are studied. ![]() Therefore in experiments, a researcher manipulates an independent variable to determine if it causes a change in the dependent variable.Ĭase example of independent and dependent variablesĪs we learned earlier in a descriptive study, variables are not manipulated. This could be many things depending upon what the drug is for, such as high blood pressure or muscle pain. Each person's response to the active drug or placebo is called the dependent variable. When a researcher gives an active drug to one group of people and a placebo, or inactive drug, to another group of people, the independent variable is the drug treatment. ![]() In experiments, these are called dependent and independent variables respectively. Variables are names that are given to the variance we wish to explain.Ī variable is either a result of some force or is itself the force that causes a change in another variable. Variance is simply the difference that is, variation that occurs naturally in the world or change that we create as a result of a manipulation. The purpose of all research is to describe and explain variance in the world. ![]()
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