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• American Polygraph Association ​

  • was established. At present it consists of over 2500 members dedicated to providing a valid and reliable means to verify truth
  • continues to be the leading polygraph
• University of Utah Research  ​

  • introduced computer assisted polygraph techniques in the early 1980’s
  • Dr. David C.Raskinand Dr. John C. Kircher.In 1998 they developed theComputer Assisted Polygraph System(CAPS)
• PolyScore and Objective Scoring System

  • completed a software program called the Polyscore
• Department of Energy​

  • review committee
  • National Academy of Science to study the scientific evidence on the polygraph. ​
• • Dr. Joseph F. Kurbis (1970) – ​of Furdham University in New York City is the first researcher who used potential computer applications for the purpose of polygraph chart analysis​
  • 1992- the polygraph made its official entrance into the computer age​

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• ETYMOLOGY​

  • The term polygraphy was derived from the Greek words “poly” which means consisting or more than one or simply many and “graphein”/ “graphos” which means to write. It means that the original Greek meaning for polygraph is many writings.​
• Conventional/ Analog 

  the old and traditional type of instrument being used in polygraphy today. ​
• Computerized Polygraph

  • a sophisticated state of the art computer- aided polygraph instrument​
• POLYGRAPHY​

  • the scientific method of detecting deception with the use of a polygraph instrument. It is defined also as the science of truth verification based upon psychophysiological analogues. ​
• POLYGRAPH EXAMINATION​

  A series of test conducted on the person involved 
• Mechanical Leg Basic Premises

  • the polygraph machine or instrument is mechanically capable of making graphical records
  • containing reliable information regarding physiological changes. ​
• Physiological Leg Basic Premise

  • among the physiological changes that may be recorded and identified are those that automatically occur only following the stimulation of specific nervous system component and from which stimulation of those specific nervous system components can be reliably diagnosed. ​
• Psychological Leg Basic Premise

  • the specific nervous system component whose stimulation can thus be diagnosed are so stimulated by the involuntary mental and emotional processes of the individual who is consciously attempting concealment of deception especially if that individual has something at stake and the prevailing circumstances lead him to believe that exposure to detection is a quite possible although undesirable​
• POLYGRAPH EXAMINER​

  • One who is capable of detecting deception and verifying the truthfulness
• OBJECTIVE OF THE POLYGRAPH EXAMINATION​

  • The ultimate objective of Polygraph examination is to obtain the Subject’s “ADMISSION or CONFESSION” of the offense committed.​
•  IDEAL EXAMINATION ROOM​

  1.It must be spacious for two persons ​

  2. It must be well ventilated ​

  3. It must be well lighted ​

  4. It must not be decorated ​

  5. It must be 90 percent sound proof ​

  6. Room should be equipped with one way mirror​
• THE SUBJECT/ EXAMINEE- any person who undergoes polygraph examination ​
• Note: As a general rule, the results of the polygraph test are INADMISSIBLE as evidence.​