Truth Spotting vs. Lie Spotting: Why the Search for Deception May Be Pointing Investigators in the Wrong Direction

Truth Spotting vs. Lie Spotting

Why the Search for Deception May Be Pointing Investigators in the Wrong Direction

By Stan B. Walters – The Lie Guy®
ORCID 0009-0002-1063-0519

For decades, interviewers have been taught to watch for signs of deception. Changes in posture, eye contact, gestures, hesitation, nervousness, and other nonverbal behaviors have often been treated as possible indicators that a person is lying. The problem is that much of that thinking is now badly dated. Research has repeatedly shown that nonverbal behavior is a weak and unreliable foundation for deception detection. Worse, an accusatory interview style can actually create many of the same behaviors investigators are taught to interpret as suspicious. If the interviewer causes the reaction, the reaction tells us very little about truthfulness. That raises a more useful question: instead of trying to identify lies, should investigators become better at recognizing truth?

The Problem With Looking for the Lie

Lie spotting encourages the interviewer to search for something wrong. Once suspicion begins to form, the interview can quickly become an exercise in confirmation. The interviewer notices behaviors that appear inconsistent, presses harder, and may interpret the subject’s increased stress as further evidence of deception. This creates a dangerous feedback loop.

The greater problem is that many of the behaviors commonly associated with lying are not exclusive to deception. Anxiety, fear, confusion, embarrassment, fatigue, trauma, and even the pressure of being interviewed can affect how someone speaks or behaves. An innocent person may look uncomfortable. A deceptive person may appear calm. When the interviewer relies heavily on appearance or instinct, the risk of error increases.

An accusatory style can make that problem even worse. Confrontation, interruption, and repeated challenges may increase cognitive and emotional pressure on the subject. The interviewer may then observe the very reactions that the interview process itself helped create.

People May Be Better at Recognizing Truth

There is another side to the problem that deserves more attention. People may be more naturally attuned to recognizing statements that appear truthful than they are at reliably detecting lies.

Truthful accounts often contain qualities that can be examined rather than guessed at. They may include details that can be checked, complications that arise naturally in a real event, sensory information, contextual details, and information that connects to other known evidence. These features do not prove truth by themselves, but they give the interviewer something far more useful than a nervous gesture or a change in eye contact: they provide material that can be tested.

That distinction is important. Lie spotting often asks the interviewer to interpret behavior. Truth spotting encourages the interviewer to evaluate information.

The shift may appear subtle, but operationally it changes the entire interview. Instead of asking, “What is this person doing that makes me suspicious?” the interviewer begins asking, “What does this account contain that can be examined, tested, or verified?”

A Different Direction for Investigative Interviewing

Modern approaches to credibility assessment increasingly focus on the content of the account and the way information is obtained during the interview. Several methods reflect this broader movement.

The Cognitive Credibility Approach focuses on increasing the amount and quality of information available for assessment. The Verifiability Approach examines details that can potentially be checked against independent evidence. Strategic Use of Evidence changes how and when investigators disclose evidence so that inconsistencies may emerge naturally rather than through confrontation. ACID also represents an effort to evaluate the structure and quality of information rather than relying on traditional behavioral assumptions.

These approaches are different in design and application, but they share an important principle: credibility should be assessed through information that can be examined rather than through behavioral guesswork.

That does not mean the interviewer ignores behavior. Behavior still matters in communication, rapport, emotional state, and interview management. But behavior should not be confused with proof of deception.

The Better Investigative Question

The objective of an interview should not be to become more confident about who appears to be lying. Confidence is not accuracy.

A more productive goal is to develop information that helps determine whether an account is reliable. That requires better questions, better listening, and a willingness to test the content of the statement against evidence that exists outside the interview room.

The future of investigative interviewing may depend less on becoming better lie spotters and more on becoming better truth assessors.

© Copyright 2026 by Stan B. Walters – All Rights Reserved
Brief excerpts may be quoted with attribution and a link to the original article. Reproduction, redistribution, or use in training materials requires written permission.

Related Video:
Inside the Interview Room #50 — Truth Spotting vs. Lie Spotting
Watch on YouTube: https://youtu.be/-UEQImfUzYc