John Larson's original polygraph, a gift to the Smithsonian from the Berkeley Police Department, where Larson was the first rookie cop with a PhD. Cade Martin In order to catch liars, the ancient ...

In 1921, John Larson was working as a part-time cop in ... He was concerned that the polygraph had never matured into anything beyond a glorified stress-detector, and believed that American ...

John Augustus Larson, a medical student and officer at the Berkeley Police ... Emotograph,” but it was destroyed in a fire in 1924. Keeler (seen setting up a polygraph in the photo) then worked on a ...

The polygraph-developed in the 1920s by John Larson, a Berkeley, Calif., policeman with a PhD in physiology-relies on the notion that people get nervous when they lie. A subject is strapped to a chair ...

It’s been 100 years since the invention of the first modern-day polygraph by John Augustus Larson in 1921. Innovation has been limited during that time. With the invention of EyeDetect+ 2.0 ...

Here's what to know. The modern polygraph was invented a little over a century ago by a police officer in Berkeley, Calif. That officer, John Larson, was inspired by the work of psychologist ...

The polygraph, historian Ken Adler wrote ... Across the country, John Larson, a Berkeley, California police officer and trained physiologist, decided to build a machine incorporating the blood ...

The book goes back a century, telling the story of John Larson and Leonarde Keeler, co-inventors of the polygraph (called the emotograph by Keeler), and August Vollmer – all three key to its ...

The polygraph machine was invented in 1921 in ... Berkeley police officer John Larson created the first machine, basing it on the systolic blood pressure test pioneered by psychologist William ...

polygraph tests are still regularly used by law enforcement and some employers. The documentary tells a story of honest intentions and sinister consequences. John Larson, one of its inventors ...

the polygraph was developed in a series of progressive additions and refinements by William Marston, John Larson, and Leonarde Keeler. In a single instrument, they brought together components that ...