In the context of the use of factorial designs to study external validity, an _____ indicates that the levels of the independent variable interact with the person variable to produce different outcomes.

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An interaction effect indicates that the levels of the independent variable interact with the person variable to produce different outcomes. This means that the effect of the independent variable depends on the level of the person variable, indicating that the results may not generalize to all individuals or populations. This is important to consider when assessing external validity in factorial designs.

In the Context of the Use of Factorial Designs to Study