EXPERT WITNESS By N., Sam M.S. - 0 The person qualified to give evidence of a scientific nature or a professional matter. EXPERT WITNESS: "Joe was expert witness for the prosecution." Related Psychology Terms LEGAL PSYCHOLOGY (Forensic Psychology) LEGAL PSYCHIATRY (Forensic Psychiatry) Counselor's Role in Emergency Teams LIE DETECTOR BDI-II Assessment ARISTOTLE (384-322 B.C.) CLINICAL PSYCHOLOGY FROMM, ERICH (1900—) EXPERT TESTIMONY Diagnosis and Treatment Planning Cite this page: N., Sam M.S., "EXPERT WITNESS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/expert-witness/ (accessed July 1, 2022).