About Polygraph Testing

What to expect, and the Accuracy
Our services

Lie Detector Accuracy

The lie detector aka polygraph was first invented in 1921 by John Augustus Larson, a medical student and a police officer from California USA. Later on Leonarde Keeler refined the polygraph making it portable and adding GSR, galvanic skin response in 1939. It was then purchased by and used by the FBI and was the prototype of polygraph as we know it today. However, the last twenty-five years have seen science and research and development allowing greater levels of accuracy for a polygraph examiner to achieve. A single issue test on modern equipment will achieve an accuracy level of between 92% and 96%.
polygraph test
92% - 96%

Accuracy

Polygraph Chronicles

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Evolution and Precision

Unveiling the history, advancements, and precision behind the truth-seeking polygraph, shaping the landscape of deception detection.
Truth Trials

In many countries, lie detectors are used as interrogation devices, the UK Government has over seventy polygraph examiners who test sex offenders, terror suspects and domestic violence abusers. In America many law enforcement and government agencies such as the FBI, CIA, NSA and many police departments use the polygraph to great effect. A lot of prospective employees are screened using a pre-employment lie detector test.

Testing Dilemmas

The control question test, also known as the probable lie test, is the test that the majority of qualified and experienced examiners would run, it was developed to overcome problems with the relevant-irrelevant testing method. Although the relevant questions in the probable lie test are used to obtain a reaction from liars, the physiological reactions that “distinguish” liars may also occur in innocent individuals who fear a false detection or feel passionately that they did not commit the crime.

Licenses

Polygraph examiners, or polygraphers, are licensed or regulated in some jurisdictions. The American Polygraph Association sets standards for courses of training of polygraph operators and has 2800 members worldwide, it’s a sign the examiner is qualified and experienced. Different countries also have local associations such as the UK Polygraph Association in the UK.

Truth Tech

The polygraph, commonly known as a lie detector, measures physiological indicators during questioning, providing results of Deception Indicated or No Deception Indicated, with a low chance of inconclusive outcomes using modern techniques.

All Lie Detectors UK Examiners

are members of the American Polygraph Association APA and the UK Polygraph Association UKPA. This ensures accuracy as they use the latest equipment and techniques during a lie detector test.
Decoding Deception

Lie Detector Results

Unveiling the intricacies of lie detection, from physiological responses to cutting-edge scoring systems, advancing accuracy in the quest for truth.
Deciphering Deception

The lie detector reveals deceptive answers by detecting distinct physiological responses during tests, setting them apart from non-deceptive answers.

The Challenge of Deception Identification

Despite the lie detector's ability to expose deception, the absence of specific physiological reactions linked exclusively to lying poses challenges in differentiating between liars and truth tellers.

Advancing Accuracy with Technology

Polygraph examiners strive for enhanced accuracy, with a recent industry push towards computerised scoring. Lie Detectors UK employs ESS scoring and integrates the ESS Algorithm for a dual-check approach, further elevating accuracy.

The Empirical Scoring System (ESS)

ESS, an evidence-based numerical model, simplifies test data analysis for psychophysiological detection of deception. Designed for easy acquisition and retention of scoring skills, it provides a validated and reliable solution supported by decades of research.

Research
Average Accuracy
Quantity
Field Examination
98%
12 Studies. 2,174 Examinations
Field Examination (Independent Analyses)
92%
11 Studies. 1,609 Examinations
Laboratory Simulations
80%
41 Studies. 1,787 Examinations
Laboratory Simulations (Independent Analyses)
81%
16 Studies. 810 Examinations

Confidentiality

Confidentiality forms the cornerstone of our work ethic. Rest assured that your case remains strictly confidential, with no discussion or sharing of details taking place without your explicit consent. Our commitment to data protection is unwavering, as we adhere to GDPR and Data Protection Laws. Our compliance is further underscored by our registration with the ICO under the number ZA335520. Your privacy and trust are of paramount importance to us.

These statistics highlight the polygraph's strong reliability, establishing it as a crucial tool for truth verification. At Lie Detectors UK, we harness this scientific precision, combined with the expertise of our professionals, to deliver trustworthy services. Whether for personal, legal, or professional needs, our lie detector tests provide insight into the truth, supported by a basis of scientific validity and precision.