Weapon focus

Weapon focus is a factor affecting the reliability of eyewitness testimony. Weapon focus signifies a witness to a crime diverting his or her attention to the weapon the perpetrator is holding, thus leaving less attention for other details in the scene and leading to memory impairments later for those other details.Elizabeth Loftus, Yuille and Burns, have all been associated with studies showing the existence of a weapon focus effect. According to a 2001 survey of eyewitness experts, 87% found the effect sufficiently reliable to form the basis of expert testimony in criminal trials.

Background Information

In the field of forensic psychology, researchers have validated the weapon focus effect and shown that a witness will remember less about a crime, or the perpetrator of a crime, when a weapon is present, as opposed to if the weapon is not present at an identical crime. As for the reason the phenomenon occurs, the two leading explanations attribute it to the cognitive arousal of the victim, or to the overall unusualness of the situation.

Focus

Focus, FOCUS, or foci may refer to:

In science, mathematics or computing:

Film

Music

Weapon

A weapon, arm, or armament is any device used with intent to inflict damage or harm to living beings, structures, or systems. Weapons are used to increase the efficacy and efficiency of activities such as crime, law enforcement, self-defense, and warfare. In a broader context, weapons may be construed to include anything used to gain a strategic, material or mental advantage over an adversary.

While just about any ordinary objects such as sticks, stones, cars, or pencils can be used as weapons, many are expressly designed for the purpose – ranging from simple implements such as clubs, swords and guns, and to complicated modern intercontinental ballistic missiles, biological and cyberweapons.

History

Prehistoric

The use of objects as weapons has been observed among chimpanzees, leading to speculation that early hominids first began to use weapons as early as five million years ago. However, this can not be confirmed using physical evidence because wooden clubs, spears, and unshaped stones would not have left an unambiguous record. The earliest unambiguous weapons to be found are the Schöninger Speere: eight wooden throwing spears dated as being more than 300,000 years old. At the site of Nataruk in Turkana, Kenya, numerous human skeletons dating to 10,000 years ago have major traumatic injuries to the head, neck, ribs, knees and hands, including obsidian projectiles still embedded in the bones, that would have been caused by arrows and clubs in the context of conflict between two hunter-gatherer groups.