John Larson demonstrates a ‘lie detector’ polygraph machine at Northwestern University about 1936. The machine, ...

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 ...

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 ...

American inventor John Larson, right, demonstrates the operation of a polygraph at Northwestern University in Evanston, Illinois, in the 1930s. - Pictorial Parade/Archive Photos/Getty Images A version ...

American inventor John Larson, right, demonstrates the operation of a polygraph at Northwestern University in Evanston, Illinois, in the 1930s.

What a polygraph test is and isn't . The modern polygraph was invented a little over a century ago by a police officer in Berkeley, Calif. That officer, John Larson, ...

What a polygraph test is and isn’t . The modern polygraph was invented a little over a century ago by a police officer in Berkeley, Calif. That officer, John Larson, ...

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 ...

U.S. Rep. John Larson, D-1st District, appeared to briefly lose his ability to speak during a press conference on Friday morning in Hartford, just over a month after Larson suffered a “complex ...

During Wednesday’s House Ways and Means Committee, Rep. John Larson (D-CT) discussed oversight of Elon Musk and DOGE. Dailymotion Posted: March 12, 2025 | Last updated: June 26, 2025 ...