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The purpose of this article is to serve as a guide for counseling psychologists to learn about a neuroscience methodology that can be used to study psychotherapy change processes. Event-related potential (ERP) is a specific type of electroencephalography that can be time-locked to a stimulus and thus allows researchers to examine neural responses to specific therapeutic techniques. A conceptual overview of the method and its applicability to counseling psychologists is provided. Additionally, this article contains basic guidelines for designing an ERP study, the tools necessary for setting up an ERP lab, and an overview of data-processing strategies. Common pitfalls encountered both broadly in neuroscience research and specifically in ERP research are discussed. An integrated review of relevant literature is presented here, along with suggestions for future counseling psychology research, with a focus on establishing biomarkers of successful interventions. (PsycInfo Database Record (c) 2020 APA, all rights reserved).