Quiz 8: Internal and External Validity

Psychology

Experiments generally have higher internal validity than correlational studies because there is more control over variables in experiments. In an experiment, the IV is the only difference between groups; with correlational studies, there arises the possibility that results are due to an unmeasured third variable.

Field research generally has higher external validity than laboratory research. Laboratory settings are artificial and have no relevance to the real world (according to some researchers).

A study with low internal validity has confounds and is uninterpretable. You cannot generalize anything from a confounded study.

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