an unattainable goal. However, any information that can be presented about the shortcomings of eyewitness testimony can better serve justice in the long run. According to a 2001 survey of experts on eyewitness testimony, 87% found the weapon focus effect to be sufficiently reliable to form the basis of expert testimony in criminal trials. There can be some ethical concerns to these expert witnesses. There are arguments that suggest that these social framework testimonies discredit the eyewitnesses and put the victims and bystanders on trial. This is not the purpose of the experts though. These testimonies are merely attempting to educate jury members of problems that can arise from eyewitnesses. There can also be issues raised about the credibility of the expert testimonies. The screening process of the experts is not very stringent and the criteria of an expert witness are not laid out in black in white. This can lead to a battle of the experts between prosecution and defense. Any testimony the prosecution or defense deems relevant to contradict the opposing side may be introduced if the judge allows it, so an expert can be called and a battle of the experts can ensue. This takes away from the central point of a trial and can overwhelm the jury. See also Emotion and memory Eyewitness memory References Forensic phenomena