What does high external validity indicate about a study?

High external validity indicates that the findings of a study are applicable to real-world settings outside the controlled conditions of the study itself. This means that the results can be generalized to a broader population or different contexts, suggesting that the study's conclusions are relevant and useful in practical situations.

In contrast, while replicability is important, it is primarily associated with internal validity rather than external validity. A large sample size may enhance the reliability and generalizability of results, but it doesn't inherently ensure that those results are applicable to real-world scenarios. Lastly, having good control over variables is associated with internal validity, as it ensures that the outcomes can be attributed to the variables being manipulated in a study.