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11/01/03 Research Methods The experimental method This method is the most popular method used by psychologists. After the experimental method, the psychologist can make a hypothesis from the results of the investigation. The hypothesis consists of two different variables; these variables are the Independent variable and the Dependent variable. Independent variable (IV): this is the variable that is directly manipulated by the experimenter, for example, the amount of noise in a room. Dependent variable (DV): this variable is affected by the independent variable, for example, how well the person does named tasks. The dependent variable is measured by the experimenter in order to make the hypothesis. All variables apart from the dependent variable, all other variables have to be controlled in order to make the experiment fair, and to find the results we want. This is known as Experimental control. Variables that have to be kept the same throughout the experiment are known as Confounding variables...

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