The effect of leading questions is one of the influential points of affecting eyewitness testimony. According to Howard, John and Robert (1982) conducted a study which is misled subjects are less to give an accurate eyewitness reports than subjects. Three hundred and thirty-one undergraduate psychology students at the university, they participated in the experiment. The students ran in groups ranging in size from 15 to 30. At the beginning of this experiment, students would be asked to look at some slides and then ready to answer some questions to find out those questions are or are not related to those slides. There are three stages of this experiment. All students viewed 29 color slides for 3 second each in stage 1. And in stage
