首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
What if we could read the mind of a terrorist? Researchers at Northwestern University in Chicago say they have taken a step clos
What if we could read the mind of a terrorist? Researchers at Northwestern University in Chicago say they have taken a step clos
admin
2020-09-03
40
问题
What if we could read the mind of a terrorist? Researchers at Northwestern University in Chicago say they have taken a step closer to that reality with a test that could uncover evil plans by measuring brain waves.
In a study published in the journal Psychophysiology, psychologists John Meixner and Peter Rosenfeld used electrodes (电极) to measure the brain waves of 29 undergraduates who had been told to mock-plan either a terrorist bombing in Houston in July, or a vacation in a different city in a different month. The researchers then presented the students with the names of various cities, methods of terrorist attack and dates. As they did so, they scanned the subjects’ brains. They watched for a particular brainwave—dubbed the P300, because it fires every 300 milliseconds— which signals recognition of something familiar.
"The P300’s amplitude (振幅) is very large when you see an object that is rare and personally meaningful to you," Meixner says. "So the amplitude of P300 was large when we presented the word ’Houston’, the city where the attack was planned. In total we were able to identify 10 out of 12 ’terrorists’". The investigators also correctly matched 20 out of 30 crime-related details, such as types of explosives and specific sites and dates.
The P300’s potential as a method for confirming concealed information was first recognized in the 1980s. But while it has long been touted as a possible substitute for the polygraph test, it has yet not been used by law enforcement anywhere in the world. One of the reasons is that it becomes difficult to use if investigators do not know the information they are trying to confirm. For instance, in Meixner and Rosenfeld’s study, the researchers would have struggled had they not known that the city in which the attack was planned was Houston, since it would be only by luck or guesswork they would have included it in the sample list of names.
What’s more, the P300 is vulnerable to what scientists call "confounding factors". For instance, if the mock-terrorists in the study were raised in Houston, which was also the location of the attack, the researchers would not know for sure what was causing the P300 spike.
But Meixner and Rosenfeld say that despite these shortfalls, the technology holds more potential than the polygraph. The polygraph measures responses like respiration and sweating, which can certainly be triggered by a lie, but can also result from any high-stress situation—including the mere experience of being interrogated by a police officer. While there is nothing that can correct this problem with polygraphs, P300s can at least be made more accurate by increasing the number of details you show a suspect.
Why has the P300 not been used by law enforcement in even one country?
选项
A、Because it has not proved to be a reliable way of getting information.
B、Because information to be confirmed should be exact.
C、Because suspects’ relatives need to be involved in the process.
D、Because the technology is too sophisticated to be put into practice.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/FPP7777K
0
大学英语六级
相关试题推荐
Forthispart,youareallowed30minutestowriteanessayentitledElectivesforCollegeStudents.Youshouldwriteatleast1
Forthispart,youareallowed30minutestowriteacompositionentitledSelf-confidence.Youshouldwriteatleast150wordsb
Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldfocusonthedifficulty
Forthispart,youareallowed30minutestowriteashortessayentitledMyViewonPlasticSurgery.Youshouldwriteatleast
Oneofourexpectationsabouteducationisthatitwillpayoffintermsofupwardmobility.Historically,thecorrelationbetw
Oneofourexpectationsabouteducationisthatitwillpayoffintermsofupwardmobility.Historically,thecorrelationbetw
Cansocietiesberichandgreen?[A]"Ifoureconomiesaretoflourish,ifglobalpovertyistobeeliminatedandifthewell-bei
A、Smallcompanies.B、Industrialists.C、Tradeunions.D、Theyoungergeneration.B短文提到,工业家们并不反对政府这些计划,他们承认,缩减工作时间会帮助他们减少成本。由此可推知,工
自上世纪70年代末以来,中国许多最优秀、最聪明的人才赴海外留学,但学成归国的只有少数。中国人才流失(braindrain)现象严重。在全球化的世界,中国需要越来越多具备国际教育背景的人才。因此国家开展了一系列引进海外人才的项目,成功吸引了越来越多的留学生
基于人才市场竞争日益激烈,工作岗位供不应求,很多大学生毕业后选择继续深造而不是就业。
随机试题
游戏给予人们的是纯粹的________,艺术提供给我们深刻的________。
孰谓汝遽去吾而殁乎!殁:
在表示内存储器的容量时,1KB为________________B。
女性患者,32岁。近3个月来反复出现右下腹疼痛,呈钝痛,进餐后加重,便后有缓解。X线钡剂灌肠呈现钡影跳跃征象。以上表现支持下列哪种疾病诊断
能够分辨1mm微粒的显微镜是
梁丘是
对药学技术人员的主要道德要求有
A.赛加羚羊B.甘草C.龙胆D.洋金花属于国家一级保护野生药材物种的是
2011年,某市工业企业(规模以上,下同)用水总量193.27亿立方米,比上年减少1.66亿立方米。其中,取水总量41.26亿立方米,增加0.57亿立方米;河湖海冷却水86.25亿立方米,增加1.09亿立方米。2010年该市工业企业
设f(x)在[0,a]上一阶连续可导,f(0)=0,令
最新回复
(
0
)