Prueba del polígrafo

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Prueba del polígrafo

Centro de Pruebas de Polígrafo

consulta gratuita en el nº Tel. 911 23 60 68

Polígrafo para empresas y particulares (confianza, engaños, acusaciones falsas, etc.).

Business GroupOfrecemos exámenes con polígrafo en toda España a domicilio o directamente en 8 ciudades del país: Madrid, Valencia, Barcelona, Sevilla, Málaga, Marbella, Zaragoza, Bilbao. Los exámenes de las ciudades mencionadas se realizan cada día. Para pedir hora, contáctese con nuestra agencia.

 

Poligrafo

Hasta los expertos en psique humana y en lenguaje corporal pueden cometer un error en la valoración del hombre. El polígrafo no se equivoca. El examen con polígrafo registra cambios fisiológicos que acompañan a la mentira. Un especialista experimentado es capaz de analizar registros del polígrafo y el transcurso del examen y contestar a la pregunta: verdad o falso.

La confianza tiene un límite

poligrafoCon la mentira damos en muchas situaciones, pero a veces puede tener consecuencias muy serias. Cuando en una empresa desaparecen bienes materiales o intelectuales, es difícil buscar un culpable en un gran grupo de empleados. Cuando una pareja comete adulterio, lo oculta. Cuando un familiar entra en conflicto con la ley, no quiere declararlo. Pero de la revelación de la verdad puede depender la condición de una empresa, su imagen o tu futuro.

El examen con polígrafo permitirá establecer qué es real y qué una insinuación. Gracias a ello el culpable será castigado y el inocente, librado de sospechas.

Sin embargo, para que el examen con polígrafo dé bases para decidir: verdad o falso, hay que saber realizarlo e interpretar sus resultados. Todos nuestros expertos tienen una experiencia de muchos años en la realización de exámenes con polígrafo y conocimiento especialista adquirida en centros científicos de EEUU.

¿En qué consiste el examen con polígrafo?


El polígrafo moderno (detector de mentiras) es un instrumento electrónico que registra reacciones fisiológicas del organismo de la persona examinada a la hora de contestar las preguntas del examinador. Estas reacciones son: tensión de la sangre, ritmo cardíaco, cambios de la resistencia eléctrica de la piel, ritmo respiratorio y actividad muscular. El examen con polígrafo no causa ninguna dolencia.

Los cambios en el transcurso de las reacciones fisiológicas registradas durante un examen con polígrafo son correlaciones de procesos emocionales fuertes. Cada emoción fuerte (que aparece entre otros en la comisión de un crimen) deja su huella persistente en la conciencia (sistema nervioso) del hombre.

En el momento de tratar a una persona con un estímulo importante para ella (en forma de una pregunta o de una imagen) que hace referencia al hecho cometido se produce activación de la huella emocional “grabada” en el sistema nervioso, lo cual demuestran los cambios en el registro de los parámetros fisiológicos.

El examen es voluntario. No se puede obligar a nadie a que se someta al examen. Al dar consentimiento para el examen la persona examinada firma una declaración correspondiente.

El examen con polígrafo tiene tres etapas

Entrevista preliminar
Su objetivo es preparar a la persona examinada: ponerla al tanto del método y las preguntas de la prueba. En exámenes especiales se hace uso del método de la entrevista con análisis de la conducta.

Prueba con aparato
La prueba consta de 10-12 preguntas a las que la persona examinada contesta “sí” o “no”. Antes de que empiece el procedimiento se realiza una prueba cuyo objetivo es establecer cambios específicos de las reacciones fisiológicas de la persona examinada.

Entrevista final
Su objetivo es aclarar las causas de los cambios fisiológicos registrados eventuales después de hacer preguntas de prueba.

A base de la evaluación del comportamiento de la persona examinada y sus respuestas y después de un análisis detallado de las reacciones fisiológicas registradas, al cliente se le informa sobre su resultado.

Los exámenes realizados por un especialista bien preparado y con una gran experiencia garantizan una alta eficacia.

La duración del examen de una persona es de un promedio de 1,5 – 2 horas. En el examen participa la persona examinada y el entrevistador. Durante los exámenes familiares puede estar presente el cliente, sin embargo sólo como observador (sin posibilidad de comentar) y con consentimiento de la persona examinada.

La historia del poligrafo

La historia de la mentira data de los principios de nuestra existencia y para revelarla se trabajó ya en la antigüedad. El primer texto al respecto es un diario de un hindú de 900 antes de Cristo. Intentó revelar la mentira a base de observaciones de enrojecimientos en la cara del examinado.

Los beduinos africanos tenían otro método: cuando el sospechoso después de tocar carbón encendido con la lengua tenía huellas de quemadura, se le consideraba culpable. Realmente era una de las torturas empleada para oprimir al acusado y probar su culpa, hasta si estaba claro que decía la verdad.

Durante la persecución de brujas en el siglo XVII con un fin parecido se empleaba un tipo especial de equipo de ahogamiento de las mujeres. Las que morían se consideraban inocentes, mientras que, las que sobrevivían, culpables y se las condenaba a morir en la hoguera.

Por fortuna, hoy en día para realizar un examen de la veracidad se emplea el polígrafo. Su origen se debe a John August Larson, un policía de EEUU. Fue el primer oficial estadounidense con doctorado y el primero en usar el polígrafo moderno (1921) en investigaciones criminales. En aquella época el polígrafo era llamado así por su función de escribir datos en papel. Después, este registro era analizado por un especialista.

¡Hoy en día los datos del polígrafo se registran y reúnen con ordenador y la eficacia de los resultados se estima en el 98% por los científicos!

Lie Detector Test – Spain

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If you are an avid watcher of movies falling across different genres, then you probably would have come across scenes where authorities are trying to interrogate a person by carefully monitoring his vitals to see if the person is lying or not. In fiction movies, sometimes a company also uses this rigorous test to interview employees so that their own dirty secrets don’t get out. But this was fictional world. Let’s talk about the lie detector test and its implications when it comes to real life. We will discuss myths and truths all coming from an informative nature. You will get a lot of useful information regarding these lie detector tests; we’ll keep it interesting and fun way. So if you are one of those people who want to dig into this topic, whether it be to just do research or reading out of curiosity, you definitely would find value in the discussion coming up.

Lie Detector Basics

Before we go into the nitty-gritty of lie detector test, it would be a good idea to discuss some basics first. It is important for you to note that polygraph test is another word you’ve probably heard before which is used as the proper name for lie detectors. The very first thing people are normally interested to know about a polygraph test is how reliable they are. It is a bit unfortunate that there is no straight answer and it is one of those things that people will say, “it depends”.

What is the real life application of the lie detector test? Without a doubt we all have a dark side of our personalities and we would want to use this test for one purpose or another, but what’s more important is to understand the general application of it and not its personal usage. To get to the application of a lie detector test, you need to think about this – where do people most often lie?

Think about which circumstances it becomes absolutely necessary to find the truth. I’m sure court came into mind; that is definitely the right answer. Court is the place where there is no room for error and you really want to know the truth of the matter. But this is where the application of lie detector test gets a bit nuanced. The court does not authorize this test with the flick of a hand. The precondition is the agreement of both the parties. This becomes a bit of a hurdle for obvious reasons. For instance, if the other party knows that it is guilty he or she would never consent to taking a lie detector test. Because of this, the purpose of having a lie detector test becomes moot.
Discussing some of the other aspects of a lie detector test, if you know have a very cursory knowledge of law then you might know the difference between an admissible evidence and an inadmissible evidence. In fact, the terms itself are quite self-explanatory and do not require much interpretation. When we talk about a lie detector test, it’s results are considered inadmissible. In other words, if you have by any chance the results of the lie detector test of the opposite party that might prove your innocence or the other party’s guilt, it still won’t be enough proof to be valid. In fact, the court will totally disregard that bit of evidence. Using a lie detector test for a case in court is a bit of a hurdle.

Reliable or Not?

Now the discussion of whether it is reliable or not. There is a widespread belief that this lie detector test can be broken. In this regard, people have boosted to break this test by using various methods. Even if these claims are true, a person would have to be quite an expert in order to properly pass this test.

It would be near to impossible for an average person to break a lie detector test and there are quite a few reasons behind that. To start with, keeping your vitals is hard task and it is virtually impossible to control your heartbeat, the movements of your eyes, the flaring up of nostrils and other things that are taken into account when taking a lie detector test. In simple words, you’re going to have to be very calm to get away with a lie detector test. The lie detector test is all about monitoring the vitals and see if there is any unusual activity.

This isn’t just any normal stuff though, these are real life physical signs that typically happen when someone tells a lie. But does every spike in the readings always indicate a like being told?
A lie detector test or polygraph test measures blood pressure, breathing and heartbeat. However, with the passing of time, the machines used in taking lie detector test are getting more advanced and checking for more vitals than ever. These tests, up until now, haven’t been really used when we talk about criminal proceedings. The reason, as mentioned earlier, is the requirement of consent on both sides.

With the reliability of lie detector test still short of 100%, there is no guarantee that it will turn out the way you wanted, or even perhaps the way it should. In this regard, you would realize it is better to not take a polygraph test at all in a court proceeding.

It is worth spending sometime exploring why a lie detector test does not give fully reliable results all the time. A polygraph test notices spikes in the vitals.

Now these spikes could erupt for a number of reasons. Once you are aware that you are being tested, it is quite natural for a person to get into stress mode. But what happens when you come under stress actually tampers with the vitals the polygraph is trying to detect. The results may seem as if you are lying. It becomes quite hard to disentangle the spikes caused by stress and the ones caused by telling a lie. This is the main conundrum with using a lie detector test. Keeping this in mind, many well-renowned psychologists who monitor these tests are who actually determine whether a person seems to be lying or not. While it may be possible in the future to exactly know the truth, this technology is still under development.

On the other hand, if we look at the statistics and hard numbers, they will show that the success rate is going up with these lie detector tests. This is one of the reasons why polygraph tests are becoming extremely popular these days. Another aspect worth mentioning about a lie detector test is that the person taking the test doesn’t simply dive into hardcore questions right away. In fact, the person taking the test is first asked very basic questions while the reactions of their body are taken note for future reference. This is important because not everyone’s bodies react the same to every situation.

The lie detector test is not a straightforward scientific method that one could implement and get 100% accurate results. It actually requires hard work and skill from the interrogator as well. So once the introduction is done, we get into the more interrogative part.

During this, the vitals are constantly checked with each and every word. It is also important to note here that the whole interrogation process is based on yes or no answers. This is because the person taking the test could manipulate the words used in the answer to his or her advantage. In fact, this is one of the ways people have passed a polygraph test in the past. They phrase their answers in such a manner which in literal sense is the truth, but in that context he or she might be lying. The results after the answers are compared with the early analysis chart that was taken in the introduction phase. Based on the comparison of these two results, a conclusion is reached regarding whether the person was speaking the truth or not.

Some people have also argued that people who are able to get away with a lie detector test possess the ability to block the relevant memories. Similarly, if you are able to maintain composure and remain calm, you can hide the reactions of your body even if you are lying. It’s all about convincing your own body that you are speaking the truth when in fact you are not. For an average person, all of this might sound very military and fiendishly difficult. This is quite true because it requires a lot of professional training full of stress and anxiety to be able to cheat on a lie detector test.

To conclude our discussion on the lie detector test, there is quite a bit out there in terms of research and studies. If you really want to get to the bottom of this, it would be a good idea to read and study these studies in detail. All in all, it is a good interrogation technique that is rising in popularity and in its application. Hopefully with time and as the polygraph research and technology improves, we can start seeing the use of these tests appear more often in critical cases.