A Researcher Conducts Interventional Research and Uses a Small Sample

A researcher conducts interventional research and uses a small sample that is not randomly selected. When the researcher replicates the study, twice, the researcher again uses the same site and another small sample that is not randomly selected. This is a threat to which type of validity?

A) Construct validity
B) Internal validity
C) External validity
D) Statistical conclusion validity

Correct Answer:

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