The Truth About Lie Detectors
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- Опубликовано: 29 сен 2024
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How do polygraphs work, and do they actually detect lies?
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Even though the courts where I live have ruled polygraphs as insubstantial evidence, the police and sheriffs office still use them as an intimidation factor.
They use them for when you have to get a clearance for the government.
@@rettbull9100 yet they still are as leaky as a sieve lol. Proof the lie detectors don't work I guess.
Law enforcement is the "legal gang" employed by the government hence their gang tactics. D2A
That being said, they are somewhat effective. Not hard evidence of course. And they can encourage people to actually answer truthfully it they believe the police can tell if they are lying.
@@rettbull9100 Yes, but it similarly used as an intimidation factor / interrogation tool. When a clearance investigator sees a reaction, they'll push farther on that line of questioning to see if you'll crack. Additionally, even if you're the most honest person in existence, if you become a nervous wreck during a polygraph clearance officers can deny you on the basis that you're overly emotional / easily manipulated under questioning (not something the US gov would want in a person who's captured by enemy nations).
My forensics professor, a Veteran SFPD detective of 40 years and an extra in Dirty Harry described polygraph tests as "pseudoscience bullshit we throw at stupid people to trick them into a confession".
Wise man.
The best "lie detector" scene I can think of is the one from The Wire where they used a copy machine lmao.
I wouldn't have believed you if you hadn't qualified it with the Dirty Harry bit.
Notice he said "stupid people", not "guilty people".
@@LastStar007 he means poc
Many people I know used to do the polygraph for their government clearances and said that, not only is it too stressful and annoying (especially because you have to redo it every 5 years), but also they often fail them 1 or 2 times before passing anyway, drawing out the entire process. Its also worth mentioning that the polygrapher is major element in how well you do on the test, some will blatantly accuse you of being a terrorist in an aggressive tone, while others will speak calmly and ask you less leading questions. Its becoming a lot more common for people to just stop renewing their higher level clearance if they don't NEED it.
Yeah, like I was thinking someone with Anxiety like myself would probably fail one super easily.
Sounds like a win for the government, as having unecessary clearance is not a good thing (speaking broadly)
@@thebestdamager7400 those recent leaks show that the gov probably gives too many people clearance anyway. And that the screening sucks
Yup super stressful, my polygraph the tester made me feel like I was a terrorist when he asked about the worst offense I ever made was downloading movies.
Also there is another sensor on the seat you sit on for the polygraph
I was accused of starting a fire that burned down a barn when I was 10. They started wanting to do a lie detector test on me and my dad asked me in private if I believed I would pass should we go through with it. Even then, 20 years ago, I told him I was nervous and that I didn't know because I knew that could influence the test. He pressed me a bit, but left it at that and told the fire Marshall we would be refusing any and all tests of any kind and if they wanted more they could go to the police. I was innocent btw.
Luke being a non-serial-killer? I have my doubts. I mean what kind of non-serial-killer owns birds? That is strictly a serial-killer thing.
"According to what one of the elders said, taking an enemy on the battlefield is like a hawk taking a bird. Even though it enters into the midst of a thousand of them, it gives no attention to any bird other than the one that it has first marked."
He sneaks in, opens the door,... adds milk to the bowl and eats that cereal...
He's just an occasional killer.
It said "non-serial killer". So just a regular killer!
What normal person does wan show for so long with Linus
i'll never forget when they hooked a lie detector up to a plant and when it got a reading they came to the conclusion that plants have emotions rather than the conclusion that maybe its not a reliable test of someone telling a lie
The real question is, was the plant guilty, did it do it? 🤔
the man that did that study came to the conclusion that the plant had the ability read his mind
@Eleanor Bartle i remember it was an episode from mythbusters
OMG- just checked and that actually happen! wtf 😂
That's American as fuck😂
There's no such thing as a "lie detector" .... only a "reaction" detector. And since the polygraph operator has exactly ZERO ability to know why a person reacts to a certain question a certain way beyond assumption, they're near-worthless for sniffing out lies reliably. And whats worse the cops KNOW THIS very well.
Even the -psychophysiological examiners- -polygraph examiners- "lie detector" quacks know it, but they will assure you it's 98% effective (as did the "expert" in the Mythbuster episode about "lie detectors"). Given that they earn their living from people believing.
"It's not a lie .. if you *believe* it."
-- George Costanza
As someone who's neurodivergent and been through a bunch of, to put it nicely, _unfair treatment_ toward me and my circumstances- Explaining _literally anything_ is both challenging and stressful to me. Especially anything with even the slightest implication of being accused of something, even inconsequential things. Telling the truth is also _more stressful_ to me than lying, due to fear of critical, truthful information being considered false if i don't explain myself _perfectly._
If anything a lie detector might be the opposite of helpful for someone like me.
Fellow neurodivergent here. Commenting in solidarity. 😊
How do you know you’re neurodivergent
@@bp9696 If you (or anyone) suspects that they have some extra-serious difficulties navigating through life or relationships, don't be afraid to go consult a mental healthcare professional for a diagnosis. ☺
@@dare2liv_nlove isn't that normal?
@@yoyoma2026 No, having extra-serious difficulty is not normal, by definition
There is no better lie detector than an angry mom who just called you by your first AND last name. Better confess to prevent worse.
Had a lie detector test once in some man’s house. The seat I was sat on was wooden and rock solid, I was hooked up with chains around my chest which restricted my breathing and my arm was being squeezed to DEATH…the whole situation was stressful enough and those factors made me even more stressed because I was deeply uncomfortable mentally and physically. According to the taker of the test I lied and he claimed it was because on one question my “butt twitched” there’s fore determining it was differential to my base. I was in that chair for a good amount of time in a stressful environment and his judgement was a twitching buttock. Total scam
Funtcase !!!
I can attest to this. I failed on my polygraph to get into a city job due to lieing about abusive behavior. I've never punched or been punched by anyone... The interigators ended up leaving me in tears both times... My faith in polygraphs vanished after the second time... Same results too.. no idea why :(
clearly a serial-killer
@@thebestdamager7400 caught me
fun fact, a show in a the uk (specifically the jeremy kyle show) used to use the lie detector test in order to detect lies by its guests (it was basically the jerry springer show). because of this, it was axed by itv due to the suicide of one of its guests (after failing the lie detector test), and was heavily criticised by the digital, culture, media and sport select committee for these reasons
Thank you for making this video. The more people know about the massive amount of doubt behind the "science" of lie detectors the better.
1:50 Dan is going even further beyond! What out, we don't know if this is his final form!
Even funny seeing as the inventory basically called his invention a disaster. And that it should have never ever been made once he saw who was using it and how many people got falsely arrested.
I have anxiety, and get stressed suddenly and often for no good reason. So I would never take one, I’d probably detect as “lying” totally at random.
A friend of mine worked for a company that made lie detectors. He legally cannot take a polygraph in a legal dispute. Pretty funny/random perk
The perfect killer.
When I was studying law in Poland at the university over a decade ago, during our psychology course we were told that variographs/polygraphs can never be treated as a valid piece of condemning evidence in court. that I does not detect lies, but an inevitable physiological response nervousness that cannot be controlled as it is way too slight and too subconscious to tame it even for people with ASPD (and other disorders colloquially called sociopaths and psychopaths), so although on a properly calibrated and fully functional machine it is not possible for a lie to pass as truth (unless a minor lie about things that don't matter to a person like what is the colour of your notebook's cover or something meaningless like that that it won't evoke an emotional response, and there's also the issue of the machine is simply malfunctioning or being calibrated wrong) but it is an absolute festival of false positives with people being truthful but so nervous that the result still makes it seem like they're lying, and that is regardless of calibrating the machine with control questions at the beginning (a step which can be also abused deliberately by people who know how these machines work by hiding a pin in a shoe and inflicting pain to themselves on the foot during the calibration stage, etc.). That they're basically rubbish and should never be used in courts and their validity, regardless of the outcome, should never be taken seriously. And especially it's dangerous for anyone accused of something they didn't do but are obviously upset about, especially when stakes are really high like being accused of child molestation and such, obviously people who never did such a thing will be reacting very emotionally when asked a question about it and a polygraph/variograph with make their denial look like a lie... it's an insanely dangerous room for abuse and miscarriages of justice especially when false accusations of the most vile things are at stake and could easily lead to ruin innocent people's lives - especially in ways that even if the court rule's someone's innocence, the reputation of the person is going to be tarnished, people will not trust that person, will consider that person from the previous example to be a vile paedo that manages to escape justice while he/she should be rotting in the harshest tier prison, that person will be ostracised in their social life, lose career and likely commit suicide. And especially if that person had a false positive on a polygraph/variograph, most people don't understand it's nto a lie detector and will not understand the court's ruling and will assume corruption or something. It's just wildly dangerous in so many ways.
Seriously, as a kid I always wondered why they even investigate. Put everyone on a detector and voila 😅
You blinked at 0:35
I was going to say that
The first thing to do if asked questions about any serious crime is say i want to talk to a lawyer first. If the lawyer suggest to take a polygraph to "prove your innocence" find another lawyer, if they were appointed because you could not afford your own you are screwed!
My brother got rejected from a job because he failed his polygraph, he pretty much wasted 6 months assuming he had a job and not doing anything
LMG is finally big enough to use their own employees for stock image replacements!
I get anxious just at the supermarket line, I can't even imagine how this would play out if i was being interrogated
Yeah, most people know this and that's why they aren't used anymore except on reality TV.
They are at best a prop to help the questioner in the performance they are putting on as part of an interrogation. It might fool the uninformed and have them confess, or it might fool the uniformed and have them confess to something they didn't do. Any organization that thinks they work shouldn't be allowed to handle sensitive public information or conduct sensitive work.
It doesn't offer any clarity of knowledge gained.
What's ever dumber is that in blind studies of highly skilled police interrogators (using props or not) trying to judge if study actors did or did not commit a staged crime they are no better than random chance at judging the truth. Which is why police questioning is about getting someone to confess to something not learn something.
I passed a polygraph test when I got a job with my state. I no longer have that job since I went to private companies that pay more, but I had minimal information and no training.
0:35 You blinked. Yes I did go back and check, I can't accept your lies Linus.
I had to have a polygraph some years back for a security clearance. There were some issues with my first attempt and personally, I felt like there was a "game" being played where I wasn't informed about the rules. So I was scheduled for a follow up. Before the follow up, I decided to do some research. One piece of data I found was that the government had a classified study about the effectiveness of polygraphy. Of course, I never got to see the actual contents of this study. But, if the study reflected what is available publically, I too would have classified it. In a nutshell, the publicly available information boils down to the following:
As a method of determining whether or not someone is lying, it's useless.
But as a method of eliciting a voluntary confession from a naive subject, it's extremely effective.
The key element is "naive subject". So in order to retain it's effectiveness, those that are being polygraphed have to be ignorant as to the limitation and effectiveness of a polygraph.
Best thing about this video is that Linus is wearing an RGB shirt, but the green (I think?) got caught with the greenscreen, so they just greyed out the keying there. Honestly, I'd buy just a "RB" shirt like this, it looks good!
Now to find the person who hasn't stolen anything from the office
"Nipples don't lie, apparently"
What a wasted opportunity. Should've been "These nips don't lie"
These are used for very specific purposes in the states. When it comes to hiring, the only time you'll encounter these is if you're applying for security clearance. They won't make or break your clearance application, but they certainly weed out those who aren't fit for roles dealing with national security. The second role, that I'm more familiar with, is used with those who are unfamiliar with what a polygraph actually is, and will actually confess to the crimes they've committed. They believe that there is no way to "beat" the machine and once they've been Mirandized, anything they say can and WILL be used against them. Poly results are not admissible... confessions are.
So, it's basically an "Are you nervous" detector.
I have practiced holding my breath for a while, until I get to keep my breath for close to 3 minutes. When you mentally wind yourself up for such an attempt, you will actually start to breathe in a very controlled manner, lowering your heartrate (lowering heart rate is the easiest way to hold it for longer, once got 100 heartbeats in 2 min 20 sec). Once you learn this trick, if you apply it at the right time it would be a childrens game to beat those kinds of lie detectors.
And while 3 min is a lot compared to someone that hasn't practiced it, there's plenty of people that can do 5 to 7 while freediving. Those will get even more conscious heart control.
i remember someone saying the polygraph is easy to beat if you just keep your composure, and pretty sure the new version can be beat with little effort
A bad case of anxiety can cause a truthful person to fail a lie detector. These things being bogus is old news. Thought everyone knew this already.
An MRI scan is currently the most dependable method for detecting lies. This is because when we lie, specific regions of our brain become active, and these areas can be observed through the scan.
but you dont lie when you sleep
mostly because you don't usually speak while sleep
Iirc that still doesn’t work for people who convinced themselves of a lie, because for them then is just remembering the lie that they repeated themselves. And this can happen to people who have just suffered a trauma. Their mind can’t process it and they just think that something else has happened.
@@afterburnerfox What? You aren't sleeping during an MRI....
@@tudalex No, it doesn't work that way. The creative part of the brain would still be active, even if they have "convinced" themselves that they are telling the truth.
fMRI I believe specifically.
The machines in blade runner aren't lie detetectors but work in the same function
Lie detectors, more like stress detectors.
In the words of George Costanza: "it's not a lie if you believe it"
I would be so stressed out just being in that environment with that contraption stuck on me that it would think I was constantly lying about everything lol. It would probably say I'm lying about my own name ha.
you do not have to go far to see a blink 0:36 - 0:37 right after looking left is a blink
Fingerprints are about as reliable as well. They only match if flat like the sample.
*gets stressed because your fate is in the hands of an unreliable machine.
0:27 the person how enjoyed the chaos of being hacked.
Sure
Notification squad!
Messing with the polygraphist is good fun tho they don't appreciate it
There's a reason why a polygraph isn't admissible in court at all.
They are 100% guaranteed to be 150% false 20% of the time
What a great RUclips thumbnail for people to use in the future when something horrible goes wrong
meeeeeh, I expected them to test some devices.....meeeeeh
Lier LIER *LIER* @ 2:12/13 and 2:22/23 I saw You Blink
great line tho' "i didn't even blink" Thanx for the laugh
Want to makea polygraph inconclusive? Put a tack in your shoe, and stab your toe when you answer ANY question (especially the baseline ones).
You can thank my 2nd year criminology professor for this one.
Even with the qualifier of "relatively", I am not convinced about any of the statements about Luke :)
Kardashians beg to differ
1:12 ........... yes, you blinked context: 6:45
Craig Bennet once MRI scanned a dead salmon, which was shown pictures of people in social situations... Turned out there was indeed relevant data generated to be interpreted as neurological activity.. Data is always up for interpretation and interpretation can be flawed a.f.
Just put a thumbtack in your shoe under a toe and slightly press on it when you aren't lying.
I checked... He blinks 35 seconds in when he looks to the side
But yes I was jebaited into giving more watch time 😂
The Russian spy said he would think of eating bagels when she was doing his test.
1:31 Linus BLINKED
They should use trained dogs to scan for microexpessions as part of a lie detector tool kit.
"Just relax" 😂
he plottin something dropping a video like this boys, he plottin.
Yeah, there's a blink around 36 37 seconds in.
No lie, my blood pressure is 10points higher on both ends when I get it taken at the doctor. Doesn't matter if I've seen this doc a hundred times already...
Next WAN show title: “Increases when damp??”
Lienus told us the truth finally 🤣
I have a Blue heart. And it grows from small to large at times...
Beauty is a lie. Ugliness is a truth. Therefore lies are a beauty that holds the world together.😌
I don't think a lie detector would ever work on me, i get stressed as soon people ask me a question
Tldr: can be inaccurate and often inaccurate
id fail every time just from the sweating alone
So a sociopath can past these easy right?
Also bc i know whats tested in a polygraph id constantly try not to do those things and bc of that id do those things
I was hoping you were going to hook the staff up to a polygraph and drill them with questions about working at LTT 😢
Scientifically speaking polygraphs are about as reliable as DNA fingerprinting, climate models, divination or fortune-telling.
lmao thats a good probation alias in the credits
There (early 2000's) was a piece of software that when used correctly was 99.999% accurate at detecting casual lies (I tried it, it really worked) I guess the NSA bought it, becuase I have heard nothing about it in the last decade and a half.
Thank you. I am so tired of hearing the term "lie detector" it is such an irritating misnomer. I am equally fed up of the plethora of dunning-kruger types who swallow any pseudoscientific garbage passing itself of as authoritative due to having "experts". There's been a LOT of that in the world recently. I don't care if someone has the title of "polygraph expert" for example.
These days many mainstream (& alternative alike) "experts" along with their followers just memorise & regurgitate whatever narrative is required to 'qualify', whether it was all garbage or not they don't care.. More concerned with how things seem than actually are, all whilst being so condescending to any who don't do likewise.
This however was refreshingly honest, well researched & explained, and so very much appreciated. Hopeful it will seep into common knowledge once & for all.
Thank you for the clarification! 😎
>better than chance. Bro they have 51% effectivity it's basically coin flip
Crap... Now how will I prove my innocence 😅
You did blink several times Linus!
Europe here, "lie detectors" are seen as a joke here, we never use them and everyone would laugh in a court room if someone suggested any evidence from these tests... It's mostly seen as bizarre American thing.
'Remember son, nipples never lie.'
I taught Linus the word Equivavalent.
Why are they spending money on expensive lie detectors, they could get the same results with a smartwatch😂
Take an Ativan prior to the test and boom, all good 👍
Missed opportunity to do the sponsor spot while under a lie detector.
He does blink in the video
The rest of the civilized western world kind of laughs at the US for using polygraphs at all...
Oh hey! An accurate thumbnail for once ;)
3:10 skip ad
Its like how fact checkers aren't even accurate either
Sure !
A better video would of been to hook it to employees
He did blink
Return of LIEnus
Brain scanning is far more accurate