BOISE - You've probably heard the saying "the eyes are the window to the soul."
Now scientists are proving that in a way with new lie-detection technology.
It's called EyeDetect and the test gauges whether someone is being deceptive based on eye movement and eye behavior.
Unlike a polygraph test, you're not hooked up to any wires or sensors, and there is no examiner in the room with the subject, the test is completely automated.
The Boise Police Department just recently began using this technology to screen job candidates. Other Idaho agencies including the Idaho Department of Correction were given a demonstration Tuesday to see if they could also implement EyeDetect.
"There are physiological markers in the eyes that give insight whether someone is being truthful or deceptive," says Neal Harris, vice president of Converus.
Harris explains how that works.
Basically, the subject sits in front of the computer, alone, and answers a series of questions.
Some questions are neutral and others are to see if the person is being truthful, such as have you ever used illegal drugs? Or, have you ever been convicted of a crime?
These questions are answered all while an infra-red monitor observes the individual's eyes.
"The infra-red sensor takes 60 measurements per second of a wide variety of variables in each eye," says Harris.
EyeDetect uses 16 markers in the eye that correlate with deception, that’s according to scientists at the University of Utah who helped develop the test.
"One of the strongest is pupil dilation but we also look at blink rate, eye movement, where the eyes fixate, which words they fixate on and other factors," explains Harris.
For a demonstration, Harris asked volunteers to pick a number and purposely lie while taking the test to see if their deception was detected. It worked.
James Page, a polygraph examiner with Ascertain Polygraph Services, says this fully automated test is a very useful alternative when a polygraph test isn't the best option.
"Polygraph is technology that requires the skill of an examiner, someone who is highly trained, they have special education," says James.
The test takes 30 minutes and results are ready in five minutes.
Along with the Boise Police Department, Harris hopes more Idaho agencies will get on board.
"It's anyone who wants to know the truthfulness of another individual," says Harris.
© 2017 KTVB-TV