History Of The Polygraph

Welcome to Meyer Polygraph, where we specialize in the administration and interpretation of polygraph tests. In this page, we’ll take you through the history of polygraph testing, from its earliest origins to the present day.

The polygraph, also known as a lie detector test, is a device that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while an individual is asked a series of questions. The polygraph is based on the principle that when a person lies, their physiological responses will change, and this can be detected by the polygraph.

The origins of the polygraph can be traced back to the early 20th century. In 1915, an American medical student named John Augustus Larson developed a rudimentary lie detector device that measured changes in blood pressure and pulse. He called it the “cardio-pneumo-psychogram,” but it was soon renamed the polygraph.

Larson’s device was quickly put to use by law enforcement agencies, and by the 1920s, polygraph testing was widely used in criminal investigations. However, the accuracy and reliability of the polygraph were still in question, and there was no standardization of testing procedures or interpretation of results.

In the 1930s and 1940s, a number of researchers and practitioners sought to improve the polygraph and establish standardized testing procedures. Among them was Leonarde Keeler, a former student of Larson, who introduced a new type of polygraph that recorded changes in skin conductivity as well as blood pressure and pulse. This version of the polygraph, known as the Keeler polygraph, quickly became the standard in law enforcement and military applications.

In the decades that followed, polygraph testing continued to be refined and improved. However, the accuracy and reliability of the polygraph remained a subject of debate and controversy. Critics argued that the polygraph was not a reliable indicator of deception, and that it was too easily manipulated by skilled liars or by nervous individuals who may have a false positive reading.

Despite the criticisms, the use of polygraph testing continues to this day, particularly in law enforcement, government, and military contexts. Many employers also use polygraph testing as part of their pre-employment screening process, particularly for jobs that involve high levels of security or access to sensitive information.

At Meyer Polygraph, we use the latest polygraph technology and testing procedures to provide accurate and reliable results. We understand the importance of maintaining the highest standards of professionalism and confidentiality, and we are committed to providing our clients with the most comprehensive and accurate polygraph testing services available.

Thank you for visiting Meyer Polygraph. If you have any questions or would like to schedule a polygraph test, please don’t hesitate to contact us.