It was interesting to see in the news this week that Charles Honts a professor of psychology at Boise State University who is also on the EyeDetects advisory board looked at recent results and stated he finds the EyeDetect system interesting but on the other hand he doesn’t use it and until its database is expanded and other people have replicated it he would be reluctant to use it in the field. There have been some unsuccessful trials for US Police Forces and limited research which could be why the technology has never gained any popularity in the UK. The UK Government rejected EyeDetect over the Polygraph in recent trials.
Polygraph machines sense changes in respiration, blood flow and skin conductance (a moisture buildup under skin). Thus, a polygraph measures physiological changes when under the stress of questioning. That questioning is intended to determine whether a person is lying or being truthful. EyeDetect measures changes in pupil size and eye movements that reflect the changes in their brain activity while a person reads and responds to a questionnaire. For the polygraph, the primary testing premise is that a deceptive person will show stronger emotional reactions to questions about topics for which they are deceptive. For EyeDetect, the primary testing premise is that a deceptive person will show an increase in cognitive load when questioned about topics for which they are deceptive. Polygraph has the research to prove its accurate when used for single issue testing, we see EyeDetect working as a screening tool. EyeDetect can be used to replace in some circumstances and/or can complement the polygraph. Studies show that the polygraph can be very accurate for event-specific questioning.
Lie Detectors UK continue to keep up to date on within the deception industry to ensure they use the latest and most accurate equipment available today.