Eye movement-based lie detector test soon

Now a group of University of Utah researchers are using eye-tracking technology to pioneer a promising alternative to the polygraph for lie detection.

Educational psychologists John Kircher, Doug Hacker, Anne Cook, Dan Woltz and David Raskin were trying to commercialise their technology for quite some time. Their efforts were rewarded recently when the university licensed the technology to Credibility Assessment Technologies (CAT).

CAT is based in Park City, Utah, and managed by venture capitalists Donald Sanborn and Gerald Sanders.

Sanders said: “The eye-tracking method for detecting lies has great potential. It’s a matter of national security that our government agencies have the best and most advanced methods for detecting truth from fiction, and we believe we are addressing that need by licensing the extraordinary research.”

Tracking eye movement to detect lies became possible in recent years because of substantial improvements in technology. The researchers claim they are the first to develop and assess the software and methods for applying these tests effectively.

Cognitive reaction

Using eye movement to detect lies contrasts with polygraph testing. Instead of measuring a person’s emotional reaction to lying, eye-tracking technology measures the person’s cognitive reaction. To do so, the researchers record a number of measurements while a subject is answering a series of true-and-false questions on a computer. The measurements include pupil dilation, response time, reading and rereading time, and errors.

The researchers determined that lying requires more work than telling the truth, so they look for indications that the subject is working hard. For example, a person who is being dishonest may have dilated pupils and take longer to read and answer the questions.

These reactions are often minute and require sophisticated measurement and statistical modelling to determine their significance.

Besides measuring a different type of response, eye-tracking methods for detecting lies has several other benefits over the polygraph. Eye tracking promises to cost substantially less, require one-fifth of the time currently needed for examinations, require no attachment to the subject being tested, be available in any language and be administered by technicians rather than qualified polygraph examiners.

Research into this method began five years ago, when faculty members started discussing the concept casually. They secured seed funding and the university’s department of educational psychology hired new faculty with relevant skills. Each member of the research team fills an important function, but few ever dreamed they would be working on lie-detection technology.

People across campus assisted the researchers. Help included research assistance from graduate students, intellectual property management through the Technology Commercialisation Office and business development advice through the David Eccles School of Business’s Lassonde New Venture Development Centre, which links faculty researchers with master’s of business administration students and graduate students from science, engineering and law.

The researchers still have more development work to do, but they hope the recent licensing will help them attract the additional funding necessary and interest from potential customers. Numerous government agencies, such as the US department of defence, department of homeland security, customs and border protection, and department of energy use polygraphs regularly to screen employees and applicants for sensitive positions, and these agencies always are looking for more effective ways to detect lies.

Cook said: “It’s exciting that our testing method is going to be taken from a basic research programme to commercial use.”

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