Scale in research refers to the level of analysis or measurement used to study a particular phenomenon. It can refer to the size or scope of the study, the range of values or categories used in measurements, or the level of analysis at which data is collected and analyzed. Researchers must carefully consider the appropriate scale for their study in order to ensure that their findings are valid and reliable. Scale can be categorized as nominal, ordinal, interval, or ratio, each with its own unique characteristics and uses in research.