Jurors treat eyewitness identification as compelling evidence in both civil and criminal trials. The strength of eyewitness testimony is demonstrated by a study (cited in Loftus and Doyle, 1992) that recorded verdicts in a mock trial. Two separate sets of the jurors heard evidence differing only by the presence or absence of an eyewitness. With no eyewitness, only 18% of jurors gave guilty verdicts. Addition of an eyewitness identification increased the proportion of guilty verdicts to 72%. Moreover, even when the identification was impeached, the guilty rate was still 68%. Several other studies have similarly found that juries tend to base their decision on a confident eyewitness identification even when other factors (such as poor visibility or bias) question its validity