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You’ve seen there is a balancing act between internal and external validity. Yet some researchers argue...

You’ve seen there is a balancing act between internal and external validity. Yet some researchers argue that if a study has low internal validity, a discussion of external validity is meaningless. Argue for or against this possibility. Why would low internal validity make external validity meaningless?

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Answer #1

Internal validity refers to how well an experiment is done, i.e. if it avoids confounding another independent variable acting at the same time and causing the recorded effect.

External validity refers to the extent to which the results of a study can be generalized to other situations and to other people. Thus if a study has low internal validity, a discussion of external validity is meaningless because external validity can be applied i.e. generalization of the findings of the experiment can be done only when the experiment is internally valid.

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