과학적 방법

The scientific method is a stepwise process beginning with observation of phenomena, followed by formulating questions and hypotheses—testable predictions about how the world will behave. Researchers then design experiments to test these ideas, collect and analyze data, and form conclusions. This cycle repeats as new questions emerge, creating a continuous process of empirical investigation and refinement.

The independent variable is the factor intentionally manipulated or changed by the researcher, such as meditation training. The dependent variable is the measurement used to determine the outcome, like the number of aggressive outbursts. Properly defining these variables through operationalization ensures researchers can systematically test cause and effect relationships in their experiments.

A control group is exposed to the same conditions as the experimental group, except for the hypothesized manipulation being tested. For example, in a meditation study, the control group might sit quietly with eyes closed instead of receiving meditation training. This comparison allows researchers to isolate the effect of the independent variable and draw valid conclusions about causation.

Falsifiability means a hypothesis must be capable of being shown incorrect through empirical observation. This criterion ensures scientific claims can be tested against reality and either supported or disproven. Theories grounded in falsifiable hypotheses, like the James-Lange theory of emotion, allow the scientific community to build confidence in findings through repeated testing and refinement.

A theory is a well-developed set of principles explaining observed phenomena, while a hypothesis is a specific, testable prediction derived from that theory. Theories are too complex to test all at once, so researchers create hypotheses to test particular aspects. As hypotheses are tested through empirical research, theories are modified and refined based on the results.

Facts are observable realities established through empirical evidence collected via systematic research. Opinions are personal judgments, conclusions, or attitudes that may or may not be accurate. In the scientific community, only facts supported by evidence from rigorous empirical investigation are accepted as reliable knowledge.

Ideas in the form of theories and hypotheses are tested against the real world through empirical observations. These observations then generate new questions and ideas, which are tested again, creating a continuous cycle. This circular process ensures scientific knowledge is constantly refined and improved through repeated testing and evidence gathering.