A researcher interested in establishing that there is a causal relationship between variables is most interested in _____ validity.

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Internal validity refers to the extent to which a study establishes a cause-and-effect relationship between the independent and dependent variables. Therefore, a researcher interested in establishing causal relationships is most concerned with internal validity. Artificial validity refers to the extent to which a study's findings can be generalized to real-life situations. Linear validity refers to the extent to which a measure is linearly related to the construct it is intended to measure. Construct validity refers to the extent to which a measure accurately assesses the construct it is intended to measure.

A Researcher Interested in Establishing That There Is a Causal