The witness role is most serious in the course of justice, to the extent its accuracy to the extent that judicial decisions accurate and fair, especially if it is evidence of a conviction, or acquittal, the only one, and often be the case, for example, issued U.S. courts in 1987 alone, 78 thousand a judicial ruling on the basis of the decision of the witnesses only, and thus stop the validity of these provisions and fairness on the accuracy of witnesses and their efficiency. Hence the need to increase the accuracy and the efficiency, and psychology played a prominent role in achieving this increase; as the certificate principally on aspects of psychological purely Calantbah a crime occurs and recognition of the merits, and stored in the memory, then restored during the trial.
The contribution of psychology in this area is not new, in 1893 tried Cattle assessment made by a witness, and the impact of trying to confuse and his insistence on this,Between the researcher and an attorney may or _ other _ to ask questions of justice in questioning the witness testimony and shown as if they were contradictory, suggesting no effect and stubbornness, the accuracy of the certificate. In 1896, interested in the world of self-German; Notzenj; the impact of media on the accuracy of the certificate, and in 1901 tried; Stern, revealed the impact of the case of witness emotional on the efficiency of restored when he saw the facts of a crime, and in 1906 issued, Stern; same scientific journal called, Psychology and the certificate jurisdiction, dealt with articles that were published research: the role of leading questions in the distortion of the certificate, and the role of attitudes and prejudices in the bias of the witness, and the factors that reduce the efficiency of child witnesses and the elderly. In 1908, publication of Hugo Monstrberg book on the stage of the certificate confirming the importance of benefiting from psychological research in the field of the certificate, and in 1914 publishing Monstrberg also an article on the