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Experts and Eyewitnesses

Here is the abstract from Kristy A. Martire and Richard I. Kemp, Can Experts Help Jurors to Evaluate Eyewitness Evidence?: A Review of Eyewitness Expert Effects, Legal and Criminological Psychology, 16(1), pp. 24-36 (Feb. 2011):

Courts occasionally permit psychologists to present expert evidence in an attempt to help jurors evaluate eyewitness identification evidence. This paper reviews research assessing the impact of this expert evidence, which the authors argue should aim to increase jurors' ability to discriminate accurate from inaccurate identifications. With this in mind we identify three different research designs, two indirectly measuring the expert's impact on juror discrimination accuracy and one which directly assesses its effect on this measure. Across a total of 24 experiments, 3 have used the superior direct methodology, only 1 of which provides evidence that expert testimony can improve jurors' ability to discriminate between accurate and inaccurate eyewitness identifications.

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