Role of Scientific Method

Knowing what to believe about research is often related to understanding the scientific method. The two basic approaches to using the scientific method, the descriptive and the experimental research approaches, differ because they seek to attain different types of knowledge. Descriptive research tries to describe particular situations; experimental research tries to determine cause-and-effect relationships. Independent variables are not manipulated in descriptive research. For that reason, it is not possible to decide whether one thing causes another. Instead, survey research uses correlational techniques, which allow the determination of whether behaviors or attitudes are related to one another and whether they predict one another. For example, how liberal a person's political views are might be related to that person's attitudes about sexuality. Such a relationship could be determined using descriptive research.

Survey research, as a widely used descriptive technique, is defined as a method of collecting standardized information by interviewing a representative sample of some population. All research involves sampling of subjects. That is, subjects must be found to participate in the research whether that research is a survey or an experiment. Sampling is particularly important when conducting survey research, because the goal is to describe what a whole population is like based on the data from a relatively small sample of that population.

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