The role of the witness is the most serious in the course of justice, in that his accuracy is to the extent that the judicial decisions are accurate and fair, especially if he is proof of a conviction or acquittal, the only one, and this is often the case, for example, American courts rendered, in 1987 alone, 78,000 judicial decisions on the basis of the decision of the witnesses only, and thus ended the validity of these provisions and the fairness on the accuracy of the witnesses and their effectiveness. Hence the need to increase precision and efficiency, and psychology has played a leading role in achieving this increase; as the certificate mainly on the purely psychological aspects Calantbah, a crime occurs and the recognition of the validity, and stored in the memory, then restored during the trial. The contribution of psychology in this area is not new, in 1893 tried the evaluation of livestock made by a witness, and the impact of the attempt at confusion and its insistence on this subject, Between the researcher and a lawyer may or _other_ ask questions of justice by questioning the witness's testimony and shown as if they were contradictory, suggesting lack of effect and stubbornness, the accuracy of the certificate. In 1896, became interested in the auto-German world; Notzenj; the impact of the media on the accuracy of the certificate, and attempted in 1901; Stern, revealed the impact of an emotional witness's case on the effectiveness of recovery when viewing the facts of a crime, and in 1906 published, Stern; same scientific journal called Psychology and the certificate jurisdiction, covered articles that were published research: the role of leading questions in certificate distortion, and the role of attitudes and prejudices in witness bias, and the factors that reduce the effectiveness of child witnesses and the elderly. In 1908, publication of Hugo Monstrberg's book on the certificate stage confirming the importance of benefiting from psychological research in the field of certificate, and in 1914 publication of Monstrberg also an article on the