John Larson's original polygraph, a gift to the Smithsonian ... By the spring of 1921, Larson unveiled the machine he called a cardio-pneumo-psychogram, and later simply a polygraph, a nod to ...

When President Ronald Reagan’s White House threatened thousands of government officials with polygraph exams, supposedly to protect classified data (but probably also to control press leaks), his ...

In the first decades of the 20th century, three men — police officer John Larson, psychologist William Marston and Larson’s assistant Leonarde Keeler — claimed the polygraph could detect a ...

"This is a simple lie detector," one of the agents informs him, gesturing toward a machine scribbling away ... Mackenzie and the police officer John Augustus Larson — over the course of decades ...

That officer, John Larson, was inspired by the work ... departments across the country. Although the polygraph was initially hailed as a machine that could tell if a person was telling the truth ...

His interests dovetailed with those of John A. Larson ... Larson unveiled the machine he called a cardio-pneumo-psychogram, ...

Ames offered his assessment of the polygraph machine in a letter from prison ... a Berkeley police officer named John Larson, who also had a PhD in psychology, would later turn on his invention ...