confabulation

What Is Confabulation?

Confabulation is the unintentional production of fabricated, distorted, or misinterpreted memories without the conscious intention to deceive. A person who confabulates genuinely believes their false memories are accurate — they are not lying in the deliberate sense that polygraph testing is designed to detect. In PDD, confabulation represents a potential source of error because an examinee who has confabulated may provide answers they believe to be truthful, and their physiological responses may reflect truthful responding even though their statements are factually incorrect.

Relevance to Polygraph Testing

Since the polygraph measures physiological correlates of deliberate deception — not factual inaccuracy — a confabulating examinee presents a unique challenge. If the examinee genuinely believes their confabulated account, they are not being deliberately deceptive when they affirm it, and they should not produce the deception-related physiological response pattern that the CQT is designed to detect. This means the polygraph may correctly classify the examinee as truthful (regarding their subjective belief) even though their statements do not match objective reality.

Causes of Confabulation

Confabulation can result from neurological conditions (such as Korsakoff syndrome, brain injury, or dementia), suggestive interviewing techniques, memory contamination from exposure to post-event information, or the normal reconstructive nature of human memory over time. In the polygraph context, an examinee who has been repeatedly interviewed about an incident, or who has been exposed to others' accounts, may develop memories that incorporate inaccurate details without awareness of the distortion.

Distinction from Deception

The critical distinction between confabulation and deception is intent. Deception requires the conscious intention to mislead; confabulation occurs without awareness of the inaccuracy. This distinction matters because the fear of detection, cognitive load, and conflict mechanisms that drive polygraph-detectable responses all require conscious awareness of deception. Without that awareness, these mechanisms are not activated.

Implications for Practice

Examiners should be aware of confabulation as a possibility, particularly when examinees show strong truthful responding on the polygraph but provide accounts that conflict with physical evidence or other reliable sources. This underscores the principle that the polygraph assesses the examinee's psychological state regarding deception, not the objective truth of their statements. Thorough question formulation and clear pre-test interview discussion help minimise the risk that confabulated beliefs will affect the examination.