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Project 5

The document discusses polygraph tests and their uses and limitations. It discusses that while polygraph tests are theoretically 100% accurate, in practice accuracy depends on human factors. Fingerprint analysis and DNA evidence also have limitations - fingerprint analysis has around a 60% accuracy rate and DNA was only able to identify 0.5% of victims from 9/11. The document advocates that while tools like polygraph should be allowed in court, judges need as much information as possible to make informed decisions. It also provides details on how polygraph tests work by measuring physiological responses like blood pressure, breathing, and skin responses during questioning.

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42 views2 pages

Project 5

The document discusses polygraph tests and their uses and limitations. It discusses that while polygraph tests are theoretically 100% accurate, in practice accuracy depends on human factors. Fingerprint analysis and DNA evidence also have limitations - fingerprint analysis has around a 60% accuracy rate and DNA was only able to identify 0.5% of victims from 9/11. The document advocates that while tools like polygraph should be allowed in court, judges need as much information as possible to make informed decisions. It also provides details on how polygraph tests work by measuring physiological responses like blood pressure, breathing, and skin responses during questioning.

Uploaded by

Bella Ciao
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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UMBAR, SHALIMAR B.

FORENSIC 5 2/21/23

3RD YEAR COLLEGE

BS – CRIMINOLOGY

REFLECTION PAPER 4

Make a reflection paper on what you have learned on this videos.

The Truth about the Polygraph / Dr Tuvya Amsel

After watching the videos on "The Truth about the Polygraph / Dr Tuvya Amsel”, I

have learned that the polygraph is reliable and efficient tool that we can use in our quest

for the tools. First theoretically all of them is a hundred percent accurate no doubt about

it. Practically the implementation it uses the accuracy rate, sometimes dramatically

because of the human factor. The fingerprint since 1995 there's an ongoing proficiency

test done annually to fingerprint expert. The results are the following 59% of them did

correctly, 7% made an incorrect decision and 34% was undecided whatever the DNA

the new queen of evidence. September 11 2001 a tragical day 23,000 and something

samples pulled out from the World Trade Center legs it have to be compared to 2007

hundreds of missing person in order to identify them out of the 23,000 samples the DNA

was able to identify only 111 people, this is less than half percent. And it's not bad

enough. Recently a Tel Aviv base life science company was able to manufacture false

DNA samples that can incriminate whoever they want. Dr. Tuvya convinced that all of

these tools should be admissible in court and should help the court the more information

so the court have the better judgements. They can make after all judges and jurors are

about human beings and they need as much information as possible in order to end. He
also said that the polygraph is electronical instrument it measures the blood pressure,

heart rate and respiratory rate. While the person is being connected to the polygraph as

the instruments is a 100% accurate instrument

Who uses polygraph tests and for what purpose?

A polygraph is a device that collects and enables the analysis of human

physiological responses through sensors physically connected to the individuals

examined by this system. The most common polygraph is the Comparative Question

Test which consists of monitoring the variations of physiological parameters, such as

blood pressure, breathing, and dermal responses during an interview. CQT relies on

two types of questions: those relevant to the purpose of the investigation and control

questions, typically utilized as a baseline to evaluate and analyze physiological

responses associated with lying. Deceptive subjects are expected to show more intense

physiological responses in answering to the relevant questions, in comparison to

responses elicited by the control questions. CQT is a not a deterministic test that can

identify deception, but rather a method to measure subjective physiological differences

which could be linked to deception, by employing a probabilistic approach.  An

alternative format of polygraph, less frequently used, is the Concealed Information Test

(CIT) is based on measuring the cognitive reaction of the examinees when relevant

information is reported by the interviewer. This technique involves recording

physiological responses, such as respiration and electrodermal activity, allegedly

associated to a reaction to significant stimulus, which could represent, for example,

crime-related information.

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