Describe polygraph test as a tool in eyewitness assessment
Explanation
Describe polygraph test as a tool in eyewitness assessment:-A polygraph test, also known as a
lie detector test, is a tool that has been used for many years in the criminal
justice system to assist in assessing eyewitness testimony. The test works by
measuring changes in physiological responses, such as heart rate, blood
pressure, and breathing, as the individual answers a series of questions. The
idea behind the test is that when a person lies, they experience physiological
changes that can be detected by the polygraph machine. In this way, the
polygraph is used as a tool to help determine the credibility of eyewitness
testimony.
Describe polygraph test as a tool in eyewitness assessment:-Polygraph tests are not always
admissible in court as evidence, as their accuracy and reliability have been
questioned. However, they can be used as a tool in the investigative process to
help law enforcement gather additional information and assess the credibility
of eyewitness testimony. In this context, the polygraph test can be useful in
several ways.\
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Firstly, a polygraph test can be
used to assess the reliability of eyewitness testimony. Eyewitness testimony
can be affected by a range of factors, including stress, anxiety, and memory
bias. In some cases, eyewitnesses may intentionally lie to protect themselves
or others, or to fabricate a story for personal gain. A polygraph test can help
to identify inconsistencies in an eyewitness's testimony, which may indicate
that they are lying or have an unreliable memory.
Secondly, a polygraph test can be
used to corroborate eyewitness testimony. In some cases, multiple eyewitnesses
may provide conflicting accounts of an event. A polygraph test can help to
identify which eyewitnesses are providing accurate accounts of the event, and
can assist investigators in determining the truth.
Thirdly, a polygraph test can be
used to identify suspects in criminal investigations. In cases where there are
multiple suspects, a polygraph test can help to narrow down the pool of
potential suspects by identifying individuals who are lying or withholding
information.
Describe polygraph test as a tool in eyewitness assessment:-Despite these potential benefits,
there are also limitations to the use of polygraph tests in eyewitness
assessment. One of the main limitations is the accuracy and reliability of the
test. While polygraph tests are designed to detect changes in physiological
responses, these changes can also be caused by factors such as stress, anxiety,
and nervousness, which are common during a polygraph test. As a result, false
positives and false negatives can occur, which can lead to incorrect
conclusions about the reliability of an eyewitness's testimony.
Another limitation of polygraph
tests is that they can be influenced by factors such as cultural background,
language proficiency, and age. For example, an individual from a culture that
values honesty and truthfulness may be more likely to experience stress and
anxiety during a polygraph test, even if they are telling the truth. Similarly,
individuals who do not speak the same language as the examiner may experience
communication barriers that can affect the results of the test.
Describe polygraph test as a tool in eyewitness assessment:-In addition, the use of polygraph
tests can raise ethical concerns. The test is invasive, as it requires the
individual to be hooked up to a machine that monitors their physiological
responses. This can be intimidating and uncomfortable for some individuals,
which may affect the accuracy of the test. Moreover, the use of polygraph tests
may be seen as a violation of privacy and individual rights, as the results of
the test can be used against them in a court of law.
Polygraph test in eyewitness assessment examples
The use of polygraph tests in
eyewitness assessment has been a controversial topic in the field of psychology
and the legal system. While polygraph tests have been used for decades to
determine the truthfulness of criminal suspects, their use in eyewitness
assessment is relatively new.
Describe polygraph test as a tool in eyewitness assessment:-Eyewitness testimony is often used
in criminal trials to provide evidence of a crime. However, eyewitness
testimony is not always reliable, and many factors can affect its accuracy. For
example, eyewitnesses may be influenced by leading questions, stress, or other
environmental factors that can distort their memory of an event. Polygraph
tests are one tool that can be used to assess the accuracy of eyewitness
testimony.
The polygraph test measures
physiological responses such as changes in heart rate, blood pressure, and
breathing rate. These responses can be used to assess whether an eyewitness is
telling the truth or lying. In eyewitness assessment, polygraph tests are
typically used to verify the accuracy of an eyewitness's memory of an event.
Describe polygraph test as a tool in eyewitness assessment:-One example of the use of polygraph
tests in eyewitness assessment is in cases where multiple eyewitnesses provide
conflicting accounts of a crime. In these cases, polygraph tests can be used to
determine which eyewitnesses are telling the truth. Polygraph tests can also be
used to assess the accuracy of an eyewitness's memory of specific details of a
crime, such as the color of a suspect's clothing or the make and model of a
vehicle.
However, the use of polygraph tests
in eyewitness assessment is controversial, and their accuracy has been
questioned. Critics argue that polygraph tests are not reliable and can be
influenced by factors such as the examiner's bias or the anxiety of the
test-taker. Furthermore, the accuracy of the test may be affected by the
test-taker's familiarity with the crime, the complexity of the crime, and the
time elapsed since the crime occurred.
Despite these criticisms, some
researchers have found that polygraph tests can be useful in assessing the
accuracy of eyewitness testimony. For example, a study conducted by researchers
at the University of Utah found that polygraph tests were able to distinguish
between true and false eyewitness testimony with a high degree of accuracy. The
researchers concluded that polygraph tests could be useful in assessing the
accuracy of eyewitness testimony in criminal cases.
Describe polygraph test as a tool in eyewitness assessment:- study conducted by
researchers at the University of California, Berkeley, found that polygraph
tests were more accurate in assessing the accuracy of eyewitness testimony than
traditional memory tests. The researchers concluded that polygraph tests could
be a useful tool in assessing the reliability of eyewitness testimony in
criminal cases.
Despite these findings, the use of
polygraph tests in eyewitness assessment remains controversial. In many
jurisdictions, polygraph tests are not admissible in court as evidence.
However, some jurisdictions allow polygraph tests to be used as evidence in
certain circumstances, such as in plea negotiations or sentencing hearings.
Describe polygraph test as a tool in eyewitness assessment:-In conclusion, the use of polygraph
tests in eyewitness assessment is a complex and controversial topic. While some
researchers have found that polygraph tests can be useful in assessing the
accuracy of eyewitness testimony, their use remains controversial, and their
accuracy has been questioned by critics. As with any forensic tool, the use of
polygraph tests in eyewitness assessment should be carefully considered, and
their limitations should be taken into account when interpreting the results.
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