It is generally believed that American psychologists have served as expert witnesses since the early 1920s (Comment, 1979), but, like their European counterparts, they consulted with lawyers and the courts, perhaps particularly the civil courts, before that time. Included in this latter category are the juvenile courts, which were a hybrid of the civil and
Under the Federal Rules of Evidence and virtually all state codes, expertise is defined by the nature and scope of the proffered opinion. The basic issue with regard to a qualifications assessment is whether the witness has the background to support his or her intended testimony. An expert must be qualified to “assist the trier
Expert psychological testimony comes in many types and concerns a vast array of subjects. Psychological expertise ranges widely both in scientific subject areas and the breadth of the legal landscape covered. Indeed, there are few, if any, legal contexts in which expert testimony on psychology does not sometimes have an impact. This is not surprising
Expert psychological testimony comes to court in a variety of forms and, in particular, at a couple of levels of generality. It often involves general research findings that, although relevant to a particular case, also transcend that case. General research findings will sometimes be used in the establishment of applicable law and decided by judges but
Expert psychological testimony, like any testimony, must meet certain criteria or standards for admissibility before it is allowed into court. Although the admissibility of expert evidence was initially governed by the general acceptance standard set in Frye v. United States (1923), more recent standards, including the Federal Rules of Evidence, have shifted focus to an
Psychologists occasionally testify about the factors that influence eyewitness identification accuracy in criminal cases in which eyewitness identification is a pivotal issue. Considerable research has addressed the need for this testimony and its impact on the jury. Typically, the expert witness is trained in cognitive or social psychology and has published scholarly work about eyewitness