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Ken Robinson's avatar

I was asked about the polygraph by a friend, sharing my reply:

Thanks, Bill. It is troubling indeed.

The first question is always the same: Is this a one-off incident, or merely the visible tip of a much larger iceberg?

Having spent years in highly sensitive compartments where I was polygraphed as often as every six months - and having been trained as a strategic interrogator myself - I have very little confidence in the polygraph as a scientific instrument.

At best, it is a tool of intimidation for the uninformed. To a knowledgeable subject, it is simply another obstacle to overcome.

Ironically, we teach our own personnel how to resist exploitation by foreign intelligence services if captured and subjected to a polygraph.

The secret is that you do not “beat the machine.” You beat the polygrapher’s interpretation of the machine results/finding.

The real contest is not physiological; it is psychological.

In many respects, it is a sociopath’s wet dream—a competition of deception, confidence, manipulation, and willpower.

The uncomfortable reality is that the polygraph measures respiration, perspiration, cardiovascular response, and stress.

It absolutely does not measure truth.

It measures reactions that an examiner then interprets as indicators of deception.

For an intelligence community that increasingly relies on advanced analytics, artificial intelligence, biometrics, behavioral science, and data fusion, it is remarkable that we still place such faith in a technology whose foundations date back to the early twentieth century.

We need more scientifically rigorous methods for identifying spies, insiders, and security risks.

The polygraph may still have limited utility as an investigative aid, but as a primary screening tool, it increasingly feels like another twentieth-century construct that has outlived its usefulness and deserves retirement.

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