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In psychology, empirically supported treatments (ESTs) are psychological interventions that have been subjected to empirical validation and demonstrated to be therapeutic for a specific clinical disorder or across a group of disorders based on a unified protocol for transdiagnostic intervention. The word empirical means subject to verification based on a course of observing and experimenting, an ongoing and cumulative process that ultimately yields a body of evidence. This evidence base serves a critical function in evaluating the impact of a given treatment, oftentimes couched within the construct of an effect size. An effect size refers to a standardized metric designed to reflect the magnitude of the impact of a specific treatment on a given problem. It is a measure of clinical or practical significance, ranging ...

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