The polygraph developed as independent processes, that were connected throughout the years, into what is now seen in today's modern application. In 1917 the first component of polygraph, the systolic blood pressure test, was invented by William Marston. Marston believed that there was a connection between emotion and blood pressure. Besides being a psychologist, writer and inventor Marston was also credited as the creator of wonder woman in the DC comic series. To learn more interesting facts and to stay up to date with Northern Virginia Polygraph continue to follow us on all of our social media outlets. If you are looking to have a polygraph performed, call us to schedule today!