Lie detector does it really work. A lie detector test, AKA a polygraph.

Lie detector does it really work The test begins with the examiner asking a series of baseline questions. The polygraph has two kinds of punishment functions: Electric Shock or Vibration. A polygraph machine is also known as a “lie detector. Telling Lies: Fact, Fiction, and Nonsense, by Maria Hartwig. What do polygraph machines record? Do Lie Detector Tests Really Work? The Truth About Lying and What It Does to the Body. Heck, if crabs lie, then we definitely do. “Our hiring process is now smoother and more insightful with the real lie detector test online service. I take beta blockers for a heart condition. For decades, we've had a fairly robust little industry of paid essay writing. What is a Lie Detector? Lie detectors were heralded as a world changing device at the time of its invention. . It should have made your intuitive minds think about how lie detectors work. We provide the highest standard of Professional Lie Detector Test services directly from fully qualified and accredited examiners for all issues including Infidelity, Thefts, Frauds and more. However, almost all other scientific platforms that deal with the polygraph say that it is lower, sometimes by a lot. ” – Michael T. Jun 16, 2022 · Watch the full interview with Steve Wilkos here: https://youtu. All they see is heart rate and chemicals in the brain when asked a question. Some experts claimed that a high proportion of persons who “failed” the polygraph subsequently confessed to crimes. In the 2007 peer-reviewed academic article "Charlatanry in forensic speech science", the authors reviewed 50 years of lie detector research and came to the conclusion that there is no scientific evidence supporting that voice analysis lie detectors actually work. Contact us for a free confidential consultation on +44 (0) 7770 464472 (UK Helpline) Aug 24, 2024 · Factors Affecting Polygraph Accuracy. The American Polygraph Association is the The polygraph, frequently shown on these television programs as a surefire way to determine a person’s guilt, is more popularly known as a “lie detector,” given its objective to catch people in a lie. It has been heralded as a technological marvel that allows investigators to accurately determine when someone is lying and Sep 21, 2011 · Lie detector tests, or polygraphs, work by comparing your responses to control and relevant questions. They include your blood pressure, heart rate and respiratory activity. The polygraph tests whether a person is lying or not by tracking breathing rate, blood pressure, perspiration, and heart rate. The purpose Oct 8, 2024 · For over a century, people have been inventing technology to catch a liar in the act. Do Polygraphs really work? Yes. It would be much easier if, when police were faced with two contradictory versions of a single event, there was a machine American inventor Leonarde Keeler testing his improved polygraph on Arthur Koehler, a former witness for the prosecution at the 1935 trial of Richard Hauptmann. Lie detector tests have become a popular cultural icon — from crime dramas to comedies to advertisements — the picture of a polygraph pen wildly gyrating on a moving chart is readily recognized symbol. That considered, lie detection has historically been quite the oddity Sep 7, 2023 · A polygraph test is more commonly referred to as a lie detector test. Check out the history a little. Jun 24, 2024 · But how does a lie detector test actually work? Basically, lie detector tests monitor a bunch of different parts of your body. Simply put, the polygraph exam doesn’t detect lies, it detects signs of emotion. I was amazed by the report’s accuracy in identifying stress indicators. ” You may have seen these machines used in movies or TV shows. A lie detector works by measuring changes in skin conductance on the basis of sweating. Polygraph machines are nothing but voodoo props, pure bullshit pseudoscience. The modern polygraph test is widely used to detect liars, but is it accurate? Get your MAG X670E TOMAHAWK WIFI today: https://us-store. However, it really does seem to work - no reason you couldn't use this as a real lie detector. What is a Lie Detector? A lie detector, commonly referred to as a polygraph, is an instrument designed to measure and record physiological responses that are believed to be associated with deception. [10] Lie detector manufacturer Nemesysco threatened to sue the academic publisher How Does Online Voice Lie Detection Work? Employing psychological and physiological cues, voice-based lie detection identifies potential dishonesty, a method now easily accessible through a lie detector online for free. Apr 23, 2006 · They're not really very accurate and you can get around them. Polygraphs are really nothing more than crude "nervousness detectors. The concept of "lie detection" is nothing new. Made of high quality ABS material, durable in use. Whenever you want to answer a question and get a correct response, you clench your butt. The primary physiological responses monitored during a polygraph examination include: Your body does have some reactions when you lie. The entire procedure can be divided into four basic parts—a pretest, control questions, the test, and a post-test evaluation. It's called glavanic skin response. A lie detector test is also known as a polygraph test. Is this how a lie detector works? Let us find out what a lie detector is first and then proceed to unravel the mystery. There are places that teach you how to beat a lie detector and the main trick is the butt clench. New Mexico allows polygraph results to be submitted as evidence in court. The polygraph has been adopted worldwide, but how do we know if lie dete The polygraph, commonly known as a lie detector has become part of our society since it became known at the end of the 1930s and thanks to John Augustus Anderson and Leonarde Keeler, its inventors. But no such thing exists, it's purely a pseudo-scientific myth. , 2011). 888 202 8421 [email protected] Schedule Your Appointment Nov 1, 2022 · While undergoing a lie detector test, telling a lie puts your body under stress, which causes it to release the hormone adrenaline. The earliest version a polygraph instrument was Jan 5, 2021 · Lie Detector Test Prank another truth or lie detector app with realistic graphics. Oct 28, 2022 · One of the things that make a lie detector test work is that the machine used in administering it can measure cardiovascular functions such as the blood pressure and heart rate. A polygraph, often incorrectly referred to as a lie detector test, [1] [2] [3] is a pseudoscientific [4] [5] [6] device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration Since lying does not produce a measurable physiological response—and hence renders" lie detection" meaningless—the plausibility of the theory of so-called lie detection tests is questioned. Lie detector tests, like most laws, only work on those already inclined to tell the truth and obey laws - rendering them unfit for purpose to catch Lalo has two really key interrogation scenes: when he meets Gus at Pollos Hermanos and when he questions Jimmy as to why his car is in a ditch. The use of polygraphs for any application is controve Jan 14, 2020 · The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. "Despite claims of 'lie detector' examiners, there is no machine that can detect lies," reads a statement from the American Civil Liberties Union (ACLU). The Lie-Detection Myth. The FBI and CIA use the polygraph; Used on telvision shows: Moment of Truth, and Maury Povich Mar 1, 2011 · Richard Wiseman has this to say on lie detection through body language (from the book 59 Seconds): For successful lie detection, jettison the behavioural myths surrounding the Anxiety Hypothesis, and look for signs more commonly associated with having to think hard. Sep 20, 2018 · Yet, for almost as long as there have been polygraph tests, there has been evidence that the machines don’t really work. Polygraph testing experts explain what the They are supposed to work by detecting a drastic change of your heart beat, your sweat, body language, etc. fingerprint test mode, spinner test mode, and Voice test mode. How Does Online Voice Lie Detection Work? Employing psychological and physiological cues, voice-based lie detection identifies potential dishonesty, a method now easily accessible through a lie detector online for free. But are polygraphs and lie detectors really one and the same when police officers, detectives, lawyers and employers talk about them? Yes, polygraphs are lie detectors and lie detectors are polygraphs. Feb 2, 2017 · Here’s what a lie detector does, in the words of the American Psychological Association: “So-called ‘lie detection’ involves inferring deception through analysis of physiological Mar 7, 2013 · There has been a lot of controversy about whether lie detectors work. The former sounds more scientific, while the latter sounds more layman. As social creatures, we’ve probably been trying to figure out how to catch each other in lies since Unga and Bunga realized they could lie. Someone else in the thread said that it’s on untranslated character page and that his Quirk was taken off the wiki page for some reason. Contact us for a free confidential consultation on +44 (0) 7770 464472 (UK Helpline) Lie Detector is a really fun toy to play with your friends, especially for truth party game. The goal of a lie detector is to see if the person is telling the truth or lying when answering certain Sep 20, 2024 · How Does a Polygraph Work? When you undergo a polygraph test, the examiner will first explain the procedure and what you can expect. In those articles you can find detailed explanations about how it emerged and about its spread, despite the large amount of scientific work that demonstrates the non-existence of a relationship between lying and eye movement. Polygraphs (that is what the "lie detectors" are actually called) are pretty horrible machines, with little usefulness as lie detectors. While some proponents argue that polygraphs are over 90% accurate, the National Academy of Sciences found that polygraphs perform—at best— slightly better than chance, but well below perfection. It looks at breathing rate, sweat level, heart rate and a bunch of other metrics. Learn how polygraphs work by monitoring physiological signs and why the Jan 19, 2025 · What is a Polygraph Test, and How Does it Work? The polygraph exam, known colloquially as a “lie detector test,’ is a popular way for employers in the private and public sectors to screen new candidates and test their employees in the event of instances of theft or breach of contract. It works by picking up changes in blood pressure, heart rate, breathing and skin conductance, which can be indicative of someone not telling the truth. Explore budget-friendly and professional-grade options for lie detector tests with Global Polygraph Solutions. answer to at least one control question will really be "yes" (after all, you've probably Sep 22, 2021 · Videos grilling the likes of Will Ferrell, Sarah Paulson, and Jennifer Lawrence have racked up millions of views. The earliest version a polygraph instrument was You might see lie detectors on television shows, but do they actually work? Can a machine tell if you're lying? Greg Foot explains how lie detectors work. Typically, when someone is lying, a well-trained polygraph examiner can tell. Do Polygraph Tests Actually Work? This is the most controversial question when it comes to Lie Detector tests. It pretends to detect the lie in three modes. Are lie detectors accurate? The accuracy of lie detectors is a subject of ongoing debate. What polygraphs do is continuously monitor and record several indicators of your body's performance, such as pulse or blood pressure. This is up from zero during my early rounds, but down from my last round of tests. Yeah, I was really confused. Brain imaging studies have shown what really happens in the brain when The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. “There is no lie detector, neither man nor machine,” the first Jun 29, 2019 · The option to use lie detector tests on serious sex offenders on parole in England and Wales has been in place since 2007 but, since 2014, mandatory tests can be attached to an offender's release This is the fan-powered subreddit for the variety show franchise "Running Man" which includes the original SBS version (South Korea), the Disney+ spin-off, Zhejiang TV's "Keep Running" (China), and HTV's "Chạy đi chờ chi" (Vietnam). Discover insights on polygraph limitations How Do Lie Detectors Really Work? (Shocking Truth!) 😱 #shorts#shorts #factsmine #DLPTBOSS #new #knowledge #education #trending #viral #funny #latest #top #a Nov 21, 2023 · In this lesson, we'll define the term lie detector, explain how lie detectors work, and evaluate the accuracy of their results. As individuals lie, stress often manifests, subtly altering their vocal pitch and tone. Basically they start with the questions they know are right. Modern detectors (aka polygraph machines) are slightly more sophisticated, but are lie detectors Join us as we delve into the world of polygraph tests! In this video, we'll explore the step-by-step process of how a polygraph test is performed, and examin Dec 30, 2021 · Details about this myth, you can find in the references. How Does Voice Lie Detector Work? Modern truth or lie detector technologies are built on sophisticated psychological principles. Jun 29, 2022 · The polygraph or lie detector test has been in use for over 100 years. The earliest version a polygraph instrument was Dec 27, 2022 · Experts explain how lie detectors work, what happens in the brain when we tell lies and how accurate polygraph tests are. Can it actually detect lies? (spoiler alert, no it can't)Shocking Liar Electric Lie Detector Party Game: http: Sometimes, they turn to a special tool called a polygraph machine. Sub Mar 7, 2013 · The term “lie-detector” suggests that a polygraph machine can detect lies. They are based on the notion that there is a "lie response" that can be measured. They detect certain physiological changes. But why do they matter? Customer Testimonials About Real Lie Detector Test “The lie detector online for free trial convinced me. And in fanfictions, everyone gives him “Lie Detector”. The earliest version a polygraph instrument was Detractors of the polygraph call lie detection a voodoo science, saying that polygraphs are no more accurate at detecting lies than the flip of a coin. Whenever you test in this app to prank your friend, it shows the analyzing method in meter analyzing which looks realistic for those who are looking it. But is the lie detector as accurate as we’re led to believe by pop culture? Aug 14, 2014 · Despite the 1988 legal ban on private employers using polygraph tests and the 1998 court decision ruling that their results are inadmissible as evidence in federal courts, there are huge Aug 5, 2004 · Most psychologists agree that there is little evidence that polygraph tests can accurately detect lies. When you take lie detector test online, our AI-driven voice analysis examines multiple vocal parameters that change during moments of stress or deception. The boundaries of what constitutes cheating are well-established in these cases: you must do the work yourself. But most of us will still be able to distinguish a ChatGPT response from a human text. ” – Emma J. I downloaded the latest version of the software, installed in less than minute. A polygraph, often incorrectly referred to as a lie detector test, [1] [2] [3] is a pseudoscientific [4] [5] [6] device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration Aug 1, 2018 · This is a “polygraph” -- which is more popularly known as a lie detector test. "The 'lie detector' does not measure Oct 31, 2020 · A lie detector, otherwise known as a polygraph test, is a device that measures several physiological indicators such as blood pressure, heart rate, respiration, and skin conductivity. The earliest version of the lie detector test was created in 1921 by John Larson, and as technology constantly grows, the new computerized model continues to ­Y­ou hear about lie detectors all the time in police investigations, and sometimes a person applying for a job will have to undergo a polygraph test (for example, certain government jobs with the FBI or CIA require polygraph tests). Have you ever wondered whether they can really tell when someone is lying? Polygraph machines work by measuring certain bodily functions. You have seen wires with sensors attached to the fingers and other places in a person’s body to check the vitals. But for all of the onscreen portrayals of lie detectors, few of us know how they actually work, or whether they’re even capable of achieving what they set out to do. These include: Micro-changes in vocal pitch Oct 4, 2018 · "The polygraph, like any other lie detection technique, measures an indirect effect of lying," says Dr Sophie van der Zee, who has expertise in forensic psychology and has researched deception for Sep 1, 2023 · Some home lie detector test kits work in that they can measure bodily changes associated with deceitfulness. Polygraph testing uses the principles of physiological changes mixed with observations in speech, body gestures, and facial expressions, in order to catch if a person is indeed Discover how lie detectors work and assess their accuracy. Dec 18, 2016 · Those who are in support of the polygraph, mainly the American Polygraph Association, claim that lie detector tests have an accuracy rate of 90 percent. The Bedouins used to force witnesses to lick hot iron, thinking that "lying causes a dryness of the mouth" and only liars would have burned tongues. American inventor Leonarde Keeler testing his improved polygraph on Arthur Koehler, a former witness for the prosecution at the 1935 trial of Richard Hauptmann. For a modest fee, you can get someone who knows your subject to do your assignment, and some of them will even give you a partial refund if it doesn't get an A. 1%) compared to others (Nelson et al. Aug 6, 2019 · The term “lie detector” most commonly refers to a polygraph. So what is it that makes AI texts distinguishable? What markers could an AI detector really spot? My first ideas (some difficult to detect): Good written text by humans can have some sort of a theme. Dec 5, 2024 · Explore the intriguing question: Do lie detectors work on psychopaths? This article delves into the challenges of using polygraphs to detect deception in individuals with psychopathic traits, highlighting their ability to manipulate responses. Does this mean you can’t undergo a polygraph examination if you have a heart condition? Polygraph machines are nothing but voodoo props, pure bullshit pseudoscience. Forget the idea that liars have sweaty palms, fidget and avoid eye contact. Most people, when hooked up to a machine in a room with a stranger asking questions are going to be nervous. Since the general public has been so (deliberately) misinformed about their effectiveness, it would be prejudicial for the prosecution to introduce the fact the a defendant It’s interesting that they uses the lie detector and in additional to the interview and I’m fascinated by the reaction of the person who didn’t pass they lie detector test, the majority admitted, many just stunned and didn’t say anything, and off course there liar that keep on lying saying the show is a setup and the lie detector is Dec 13, 2023 · How Do Lie Detector Tests Work? There's more to the polygraph test than the machine itself. Jan 14, 2020 · It does work much of the time. But are polygraphs and lie detectors really one and the same… Jan 14, 2020 · The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. Feb 2, 2017 · Here’s what a lie detector does, in the words of the American Psychological Association: “So-called ‘lie detection’ involves inferring deception through analysis of physiological responses Oct 16, 2018 · The truth about lie detectors is that we all really want them to work. Due to the fact that polygraph tests (NOT lie detectors, they DO NOT detect lies) are so unreliable they are not admissible in court, anymore then a phrenology report. Its just that it's reputation got over inflated. ”, you clench your butt and answer. Put tester's fingers on the sensing slots of the lie detector, it will punish the liar when his heartbeat speeds up. •Like •Share ↗️•Comment 💬•Subscribe 📲and turn on the Bell button 🔔 OUTLINE:00:00:00How Vitamin D Works in the Body00:01:30How Does a Lie Detector Work?0 Greatstar Electric Shocking Lie Detector, Finger Lie Detector Test Polygraph Game Finger Shock Truth Or Dare Party Game Novelty Drinking Game Analyzer Consoles Gifts for Kids and Adults 3. The earliest version a polygraph instrument was The polygraph lie detector works on the same principles as detecting deception through observing behavioral and physiological signs, and it is vulnerable to the same problems. Discover how lie detectors work and the science behind polygraphs! 🔍Can they really detect the truth? 🤔Let's dive into the technology and what it reveals! Oct 4, 2018 · "The polygraph, like any other lie detection technique, measures an indirect effect of lying," says Dr Sophie van der Zee, who has expertise in forensic psychology and has researched deception for In this video excerpt from NOVA scienceNOW, learn about polygraph tests and lie detection. Employee Polygraph Protection Act of 1988 bans the use of polygraph tests for pre-employment screening because they work. Jul 20, 2021 · On 11 December 2019, nine months after Wilkos’s admission that he would never take a lie detector test, he accused Anca Pennington, a guest on his show, of having burned her infant daughter with cigarettes, because she had failed a lie detector “test” administered by the show’s polygraph operator, Daniel Ribacoff. However, this device, which is commonly used in criminal investigations, actually measures nervous excitement. Empirical evidence is presented that disputes the accuracy of testing and shows the high rate of false positive misclassiflcation (eg, misclassifying a Dec 3, 2017 · This video reviews the evidence supporting and refuting the accuracy of polygraphs (lie detector test). Some people will swear up and down that polygraph tests are very reliable. Book your test securely online from £390 in our office or your home anywhere in the UK, 7 days a week. be/A1j0IbIcOw4 Oct 6, 2024 · Lie detection tests work by using a polygraph to measure blood pressure, heart rate, and breathing patterns as a person answers questions about his circumstances. But if the tested person is trained enough to not sweat when lying or staying completely focused, the lie detector can say that an actual lie is the truth. Some polygraphy models, in fact, claim that they’re police- or military-grade. The presence of adrenaline in the bloodstream causes some of the physiologic processes within you to spike. But how exactly does this machine work, and is it really as accurate as polygraph examiners claim? I guess we all know that AI detectors are extremely unreliable. Lying can cause stress, which produces common physiological responses, such as an increased heart rate and sweating. Also there are several documented cases of people who were found guilty because of solid physical evidence that passed the lie detector test. The earliest version a polygraph instrument was Jan 14, 2020 · The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. This preliminary step is designed to put you at ease and ensure you understand the process. So, when they ask, “is your name. Jul 12, 2017 · Unboxing the Electric Shock Lie Detector Game. The Vigilantes manga has his sister have a touched-based lie detector Quirk called polygraph. The idea is twofold - 1) even if I were trying to remain call while lying, the polygraph is sensitive enough to show meaningful changes in the measures of autonomic arousal out of my conscious control; and 2) when I'm telling the truth, the anxiety of the situation (undergoing a polygraph test and being scrutinizingly questioned) will not cause Jan 14, 2020 · The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. Several factors can influence how accurate a lie detector test is: Technique Used: Some polygraph methods, like the event-specific Zone Comparison Technique (ZCT) with Empirical Scoring System (ESS), show higher accuracy rates (92. Jan 14, 2020 · The modern polygraph, better known as the “lie detector test,” is a fascinating little instrument with a long and controversial history. May 7, 2024 · Discover how having an anxiety disorder might affect your lie detector test results and what you can do to prepare. It measures and records several physiological indicators such as blood pressure, heart rate, respiration, and skin conductivity. Psychopaths do not understand behavioral cost the way normal people do so the stakes are never perceived as high, nor do their brains really even recognize that they are lying when being untruthful. May 8, 2023 · Lie detectors can be unreliable. With accuracy rates dropping to around 60%, the complexities of human behavior complicate truth assessment. Polygraph testing uses the principles of physiological changes mixed with observations in speech, body gestures, and facial expressions, in order to catch if a person is indeed Apr 14, 2023 · One example is the common polygraph or lie detector, and it has been used in criminal cases over the last several decades, often providing evidence of deception for the prosecution. A lie detector test, AKA a polygraph. Then Nov 26, 2024 · Two of the seven AI detectors I tested correctly identified AI-generated content 100% of the time. Plugged in the detector input system (one USB cord that is connected to a box with 4 other connectors that connect to the person being tested). Discover how lie detectors work and assess their accuracy. I actually ended up in the ER on Christmas Eve because I hadnt slept for days, got delirious, decided it would br a good item to triple all the meds I normally take since they cause sleepiness, got sick, then managed to break out of the delirium enough to call 911 and was Sep 25, 2020 · Early Lie Detection. be/A1j0IbIcOw4 Mar 3, 2023 · The science behind lie detectors: how accurate are they and Do Lie Detectors Actually Work? A lie detector, also known as a polygraph, is a device used to detect lies. Here’s what research reveals about our networks’ gravitational force. It has been heralded as a technological marvel that allows investigators to accurately determine when someone is lying and Oct 6, 2024 · Lie detection tests work by using a polygraph to measure blood pressure, heart rate, and breathing patterns as a person answers questions about his circumstances. It uses the fact that when you lie, your skin usually goes up in its conductivity because you sweat, and you sweat because you're nervous. Read the full article here. If you take the wrong dose or too many it will really fuck up your heart rate. The history of lie detection technology is unsurprisingly quite long. Mar 8, 2023 · The Science Behind the Lie Detector: What does the lie detector really detect? The lie detector, or polygraph, is a machine that measures and records several physiological indices such as blood pressure and flow, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions. The earliest version a polygraph instrument was Sep 1, 2023 · A polygraph test is more commonly referred to as a lie detector test. com/MAG-X670E-TOMAHAWK-WIFIHow do polygraphs work, and do they actually detect lies?Leave a repl Mar 7, 2013 · The term “lie-detector” suggests that a polygraph machine can detect lies. It get pretty weird. It is not 100% accurate though. The polygraph was wildly popular in the mid-20th century, until science and federal law cracked down. The answer is simple. The reason lie detectors are not permissable in court in many nations is that they do not detect lies. Aug 31, 2024 · Understanding Lie Detection: The Basics 1. But it’s important for individuals shopping for at-home lie detectors to know that many polygraph kits for home use are just party toys. Jan 24, 2020 · Lara Warmelink does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond The people around us have a stronger influence on our decisions and actions than we realize. " Apr 28, 2023 · Dive into the science behind lie detection, explore the factors influencing polygraph test accuracy, and debunk common misconceptions to better understand the challenges and implications of using lie detector tests. In both, he uses the kind of death stare/total lack of emotion that Tuco tries to emulate. This video explores whether polygraph lie detector tests are scientifically reliable. 7 out of 5 stars 79 How Do Lie Detectors Really Work? (Shocking Truth!) 😱 #shorts#shorts #factsmine #DLPTBOSS #new #knowledge #education #trending #viral #funny #latest #top #a Lie detectors really don’t prove anything and they really should be disregarded as any proper scientific measurement. It also monitors respiratory activity, which the heart can influence. " Nov 7, 2013 · A polygraph is basically a fancy stress recorder to detect common symptoms of stress: increased pulse, higher breathing rate, higher blood pressure, and perspiration. If you Google around for some info (which I’m guessing you may already have), you’ll find that there is a lot of skepticism about whether lie detectors actually detect lies. Correspondent and New York Times technology columnist David Pogue commits a staged crime and undergoes a polygraph test to find out how it works. But how does a lie detector test actually work? Well, basically a lie detector tests monitor a bunch of different parts of your body. msi. It is perfectly possible for a nervous person to get a false positive or for a good liar to get a false negative.