ICH Good Clinical Practice (GCP) For Certified Clinical Research Coordinator (CCRC) Practice Exam

An impartial witness is an independent observer whose role is to ensure that informed consent is obtained freely and properly documented, especially when a subject cannot read or write. The description that best matches this is an independent ethics committee (IEC/IRB) composed of medical professionals and non-medical members, whose job is to protect the rights, safety, and well-being of participants and to provide public assurance by reviewing and approving the trial protocol, the investigator’s qualifications, facilities, and the methods used to obtain and document informed consent. This framing emphasizes independence and protective oversight—the core idea behind the impartial witness. The other options describe roles that are not independent witnesses in the consent process (sponsor data manager, regulatory authority member) or are phrased more narrowly about protocol approval without the witnessing aspect.