The Distinction Between Reliability + Validity

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Reliability

Key question: If a sociologist repeated any piece of research, following the same methodology, would he or she get the same result?

expected= yes it is reliable

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Validity

How far does this data give us a true or valid picture of the subject of research

Must do some methodology to answer

Eg, how well does the method used match the research subject?

Sociologist evaluates if it is valid

Sometimes data is both or neither