Bernhard Schieber

Interpersonal Deception Theory: Turn Suspicion Into Verification, Not Proof

Communication · Executive Insight Brief · 448

Suspicion changes the behavior it judges

Interpersonal Deception Theory treats deception as an adaptive exchange in which sender strategy, receiver suspicion, relationship, and feedback alter the behavior being judged

Premise

Deception in conversation is not a fixed package of behavioral cues waiting to be decoded. Interpersonal Deception Theory (IDT) treats it as an adaptive interaction. A sender manages information and credibility while monitoring the receiver; the receiver evaluates the account, displays belief or suspicion, asks questions, and thereby changes what the sender does next.

For executives, investigators, and compliance leaders, the implication is procedural. A pause, gaze shift, qualified phrase, or change in detail cannot be interpreted independently of the exchange that produced it. Suspicion itself can change behavior. The useful question is not “Which tell proves deception?” but “What claim now requires verification?”

Interpersonal Deception Theory — Suspicion changes the behavior it judges. Executive Insight Brief 267 by Bernhard Schieber.

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