The extent to which an experiment has effectively controlled for confounding variables is called:

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Internal validity refers to the ability of an experiment to eliminate or control for confounding variables that may affect the results. Operational validity refers to how well the experiment measures the variables it claims to measure. External validity refers to the generalizability of findings to real-world settings. Central validity is not a commonly used term in psychology or research methodology.

The Extent to Which an Experiment Has Effectively Controlled for Confounding