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