Polygraph Machine: Polygraphy Meaning, Uses and the Purpose

Polygraphy

Definition of Polygraphy, Parts of "Polygraph Machine" Purpose of Polygraph Machine and Uses of Polygraph Machine.

Polygraphy Meaning

Here is the real polygraphy meaning: from the original word Greek Poly which means "many" and Graphy which means to "write", if combined and the direct meaning is "Many Writings". This is the most accurate meaning of Polygraphy where the word or the idea of Polygraph came from.

Polygraph

Polygraph is same meaning with polygraphy. This device was called Polygraph in the reasons that all major parts of this device is automatically writing during the course of examining of the subject by technician. This scientific examination is called Polygraphy.

Subject – is a person who is undergoing examination conducted by Examiner or Technician to attest his or her truthfulness in the case. This is the term used in polygraphy's test.

Technician - refers to the person who conducting "Polygraph examination" to help the investigators solve the crime. This is the correct term for technician in terms in this science's examination.

Polygraph Machine

Major Parts of Polygraph Machine:

Pneumograph  in Polygraph– the pneumograph was from the word Pneumo which means lungs. Graph which means to write ㅡ lungs' write. Record the breathing of the subject and the result of the test was recorded on the paper which pulled of kymograph.

Galvanograph in Polygraph - From word galvanic - attach in the little finger to record the electricity of the body of the subject, known as galvanic skin response.

Kymograph in Polygraph- A motor that pulls the paper that records all findings regarding the subject's body. Without this type of parts; the polygraph machine is useless.

Cardiograph  in Polygraph- The purpose of this is to record the movement of heart. From word Cardio; Latin word which means heart. All graph is implies to the words "to write" ㅡ write.

Polygraph Test

Polygraph test  - a test made by technician to the subject to attest his or her truthfulness in the case. A test by use of Polygraph machine is called Polygraph test. Polygraph Examination is a synonym of polygraph test.

Uses of Polygraph Machine

Here are the uses of Polygraph Machine:

Pneumograph – is recording the breathing of the subject. Sometimes the subject is holding his breath to avoid tracing and the examiner called it breathing suppression.

Breathing suppression – is a sudden or slowly holding of breath to avoid tracing of breath.

Galvanograph – is design to record the electricity of the subject’s body.

Kymograph is a machine that pulls all the papers which records the data interpreted by all major parts of Polygraph Machine.

Cardiograph – this part is the responsible for tracing the heart.

Purpose of Polygraph Machine

The invention of the this thing was reason and here are the purpose of polygraph machine. The first intention is to use for solving a crimes especially to the suspects who might the responsible of the crime in the particular area.

Some law enforcement agencies are using this device to examine the applicant’s honesty before they will accept in the position. If you have planned to apply in the CIA or Central Intelligence Agency, you will be asked if you are willing to take the polygraph examination as a mandatory compliance before hiring.

The first invention of this machine was accepted in court as evidence but due to some issues this machine now is not accepted as evidence in court to prove the defendant’s responsibility. Polygraph machine now is only a lead to investigators to identify the truthfulness of the subject or suspects.

Information about Polygraph Machine

Not all information regarding this machine was correct, here below was the wrong information about polygraph machine.

Galvanograph - according to others it is recording the "skin resistance." How the resistance will record? There is really resistance occurred? the answer is no; there is no such instance occurred; the main purpose of galvanograph is to record the electricity of our body.

As human we have electricity in our body; that electricity is rising if our emotion changes;during the lying of person the electricity of our body is rising and the use of galvanograph is to record the electricity of our body and that machine record the findings whether there is rising of emotion. if there is rising; the subject is not telling the truth during the direct questions given. The galvanograph is important part of Polygraph. All of them has its own uses and purpose. In the above you learn the uses, purpose and the "meaning of polygraphy".

Polygraph Machine is an evidence - After the invention of Polygraph Machine; many years that this machine was perfectly developed; the history of Polygraph machine was the correct information whether how this machine develops and originated whether who are the inventors and the scientists who developed the parts as parts of polygraph machine that record the occurrence of the human system.

The Polygraph machine was become evidence after the invention and the accuracy is very strong and very helpful in pinpointing the actual malefactor of the crime.  However; when the time came that this machine was rejected its accuracy and there is a great liar who surpass the examination of Polygraph Machine. This machine now were use by Police Agencies as a lead not as evidence.

Questioning Techniques during Examination of the Subject

These questions might used by examiner and below are the questioning techniques during examination of the subject.

Here are the techniques and purpose of questioning of the subject:

Direct Questions

• Are you the responsible of the crime?

• Why did you do that

• Why did you kill the victim?      

Indirect Questions

• How's your family?

• Do you have boyfriend? (if woman) Do you have girl friend? (if man)

• What is your name?

In the direct questions are those questions that are closed related to the case.

For Example:

Those are the basics questions technique to catch the subject's response in the direct questions.

In the indirect question are those questions that are not related to the case and the purpose of these techniques is to pacify the subject's body system to get the best accurate result. As first timer's subject, it is normal in us that we have a little nervousness. Those are some reasons why the indirect questions invented.

For Example:

Those are the questions that may pacify the subject's body system to minimize the nervousness to get the best result in direct questions. Those are the purpose of Polygraph machine in Polygraphy.

Polygraph Machine is Helpful or Not

This machine was now a lead and not used as evidence; the question is; is polygraph machine is helpful or not?

Since the Polygraph machine was invented had a reason ー for detecting lies? In the deeper understanding about polygraphy ー this machine is not design for detecting lies but misleading information from the subject owing to that the subject was just misleading the technician but not for "lie" detection purpose.

The importance of this machine to the Law Enforcement Agency is to lead them into the fact of the case to pinpoint the real creator of the crime that has been committed.