"Variable Any measurable event, characteristic, or property that varies or is subject to change. Researchers must operationally define the variables they study. –An operational definition specifies how a variable is to be measured. Operational definitions are particularly important for defining variables that cannot be directly observed. Source: http://in.docsity.com/en-docs/Understanding_Social_Problems_-_American_Social_Problems_-_Lecture_Slides_"
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