EyeDetect or Polygraph: Which Method Fits Your Case?
“Which is better — EyeDetect or a polygraph?” has no universal answer. Both detect deception, but they do so along completely different routes and therefore suit different cases. This comparison should help you choose before you book an appointment.
Two methods, two principles
The polygraph measures the autonomic nervous system: respiration, cardiovascular activity and electrodermal activity are recorded in parallel while an examiner asks questions agreed in advance. A person runs the examination, the instrument produces the charts, and scoring follows an established numerical system.
EyeDetect takes the cognitive route. The participant answers true-or-false statements at a computer while a high-resolution camera tracks the eyes, including pupil response and gaze behaviour. No sensors are attached to the body at all. The test is fully automated and the evaluation is algorithmic.
Side by side
Duration. EyeDetect: 15 to 30 minutes, with a result in under five minutes. Polygraph: two to three hours including the interview and analysis.
Accuracy. Scientific studies put EyeDetect at 86 to 89 per cent depending on the type of test. The polygraph operates in a comparable range but depends more heavily on the examiner’s experience and on how well the questions are framed.
Comfort. EyeDetect is non-invasive — no cuff, no electrodes. Many people find that markedly easier.
Throughput. A single EyeDetect station handles up to fifteen examinations in a working day. A polygraph examiner manages two or three.
Flexibility. Here the polygraph wins: the examiner can probe during the interview, adjust wording and respond to what is happening in the room. EyeDetect works from fixed test batteries.
Bias. Which is precisely where EyeDetect gains: the automated sequence is identical for every participant and leaves no room for sympathy or antipathy.
Which to choose when
Choose EyeDetect if several people have to be checked, the task is pre-selection or regular monitoring, time is short, or the person is unwilling to be wired up. Typical uses: pre-employment screening, recurring integrity checks, a wide circle of suspects. Details here: EyeDetect in Hamburg.
Choose the polygraph if the matter is a single clearly defined incident, a written report has to convince a third party, or the facts are complex and need to be sharpened in conversation. Typical uses: suspected infidelity, a specific theft, clearing someone wrongly accused. Details here: polygraph testing in Hamburg, with the procedure set out in how a lie detector test works.
Choose VerifEye if speed and mobility matter most and a first assessment is enough.
Combining the two
In practice we often work in two stages: EyeDetect as a broad screen, followed by a full polygraph examination for the few cases that remain flagged. This saves considerable time and money and keeps the group subjected to intensive testing small — which, inside a company, is also a matter of proportionality.
What applies to both
Voluntary participation without exception, written consent, no disadvantage for declining, a question list agreed in advance, and honest handling of inconclusive results. No credible method reads minds, and none replaces proper fact-finding — both provide a strong additional signal rather than the whole truth.
Frequently asked questions
Can I do both tests on the same day? Yes — in a two-stage check that is the usual sequence.
Do I need to speak German? Both methods can be run in several languages. Tell us which one when booking.
How much does the difference cost? EyeDetect is cheaper per person; the polygraph produces the more detailed report. The online calculator gives an indication.