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 ...

When President Ronald Reagan’s White House threatened thousands of government officials with polygraph exams, supposedly to ...

and infallible—the same claim John Larson and his colleagues once made about the polygraph machine. Larson often found himself investigating people who, like Helen Graham, felt desperately ...

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 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 ...

Despite their widespread use over the years, polygraph tests are not nearly ... James Mackenzie and the police officer John Augustus Larson — over the course of decades, the polygraph was ...

The man credited with fully developing the polygraph, a Berkeley police officer named John Larson, who also had a PhD in psychology, would later turn on his invention as unreliable, according to ...