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Scientific Method

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least in the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation. It involves formulating hypothesis, via induction, based on such observations; experimental and measurement-based testing of deductions drawn from the hypotheses; and refinement (or elimination) of the hypotheses based on the experimental findings. These are principles of the scientific method, as distinguished from a definitive series of steps applicable to all scientific enterprises.

Though diverse models for scientific model are available, there is in general a continuous process that includes observation about the natural world. People are naturally inquisitive, so they often come up with questions about they see or hear, and they often develop ideas or hypotheses about why things are the way they are. The best hypotheses lead to predictions that can be tested in various ways. The most conclusive testing of hypotheses comes from reasoning based on carefully controlled experimental data. Depending on how well additional tests match the predictions, the original hypothesis may require refinement, alteration, expansion, or even rejection. If a particular hypothesis becomes very well supported, a general theory may be developed.


Although procedures vary from one field of study to another, they are frequently the same from one to another. The process of the scientific method involves making conjectures (or hypotheses), deriving predictions from them as logical consequences, and then carrying out experiments or empirical observations based on those predictions. A hypothesis is a conjecture, based on knowledge obtained while seeking answers to the question. The hypothesis might be very specific, or it might be broad. Scientists then test hypotheses by conducting experiments or studies. A scientific hypothesis must be falsifiable, implying that it is possible to identify a possible outcome of the experiment or observation that conflicts with predictions deduced from the hypothesis; otherwise, the hypothesis cannot be meaningfully tested.

The purpose of an experiment is to determibe whether observations agree with or conflict with the predictions derived from the hypothesis. Experiments can take place anywhere. There are difficulties in a formulaic statement of method, however. Though the scientific method is often presented as a fixed sequence of steps, it rather presents a set of general principles. Not all steps take place in every scientific inquiry, (nor to the same degree), and they are not always in the same order.

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