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
2021-03-22
71
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 Rosenf eld 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.
The limitation of the P300’s "confounding factors" is likely to_________.
选项
A、hide the truth
B、present details of a study
C、offer concealed information
D、affect the results of a study
答案
D
解析
推理判断题。解答本题的关键在于理解定位句中的is vulnerable to…“易受…”。定位句意思是,P300很容易受被科学家称为“混淆因素”的影响。由此推断,P300的局限性会对研究结果产生影响,因此答案为D。
转载请注明原文地址:https://kaotiyun.com/show/FoJ7777K
0
大学英语六级
相关试题推荐
Amassivepoolofwarmoceanwateriscausingchangesintheatmospherethatcouldproduceunusualweatheraroundtheworldint
Amassivepoolofwarmoceanwateriscausingchangesintheatmospherethatcouldproduceunusualweatheraroundtheworldint
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenextbigissue:Shouldtheytrytohaveagirl?Itwas
Anewhigh-performancecontactlensunderdevelopmentatthedepartmentforappliedphysicsattheUniversityofHeidelbergwill
Tsunamis[A]UpuntilDecemberof2004,thephenomenonoftsunamiwasnotonthemindsofmostoftheworld’spopulation.Tha
AstudyconductedbyanAustralianscienceagencyhasdiscoveredsignsthatthecountry’sancientAboriginesmayhavebeenthew
A、Tohaveathree-weekholiday.B、Tospendhisremainingyears.C、Topatenthisinventions.D、Toteachatauniversity.D
Beinginchargehasitsbenefits:Moremoney,morecontrol,morepower,andapparently,morejobsatisfaction.Recentlythe
Inlastyear’sSciencestudy,researchersatJohnsHopkinsUniversityexaminedtherelationshipbetweenstem-celldivisionsand
随机试题
可见于肝胆湿热证,而不见于湿热蕴脾证的证候表现是()。
语言发展的关键期是
饴糖温补甘缓,属于其功效的有
我国消防安全的基本方针是()。
中间消防车道与环形消防车道的交接处应满足消防车转弯行驶的要求。普通消防车转弯半径为()m。
某水泥厂年产水泥100万吨,每吨水泥的成本为900元,为了降低成本,减少环境污染、降低消耗和稳定产量,需要进行技术改造。如果进行技术改造,需耗资8000万元,技术改造完成后,每吨水泥的成本降低至850元,环境污染问题、消耗过高问题和产量不稳问题,均能得到一
一位华侨回国旅游时不慎丢失护照,导游协助其补办证件。以下做法正确的是()。
【2015.河北石家庄】针对如何对待自己做过的数学题,王老师引发并组织学生进行讨论,最后同学们决定每个人都建立一个数学题记录本,做题不顺畅、掌握不牢固的题用黑笔写到笔记本上,完全不会或者做错的题用红笔记到笔记本上。分析教师这样引导学生的目的,阐述
在嵌入式系统的存储机制中,为了保证Cache和Memory的数据一致性,通常有三种方法,依次是writethrough,postwrite和writeback,其中下面属于writethrough的特点的是()。
下列与队列结构有关联的是
最新回复
(
0
)