Chapter 11 addresses a fundamental challenge in deception detection: the inherent advantage that deceptive individuals possess simply because they control the information being sought. The authors argue that when someone has information they wish to conceal, they enter any questioning scenario already holding strategic superiority over their interrogator. Questioners should be aware that someone who’s lying often has a psychological “cliff”: They have already decided, “I can only tell them up to here” (140). Once they reach that cliff edge, the deceptive person will have to weigh the risks of disclosure against the consequences of continued concealment.

The chapter introduces the concept of “psychological entrenchment,” a behavioral phenomenon in which repeated lies become easier to maintain and harder to abandon. The authors warn that traditional interrogation approaches—particularly asking negative questions or repeatedly pressing for the same information—can inadvertently strengthen a deceptive person’s commitment to their false narrative. Each time someone verbalizes a lie, their psychological investment in that deception deepens.

To counter these dynamics, the authors present several tactical approaches rooted in behavioral psychology. Their primary recommendation centers on using question prologues—brief explanatory statements that precede key questions. These prologues incorporate legitimacy statements that explain why the question is important, rationalization that provides socially acceptable reasons for potentially problematic behavior, minimization that reduces the perceived severity of any admissions, and projection of blame that shifts responsibility away from the individual. The authors cite Robert Cialdini’s research on influence and persuasion to support their approach, noting that people respond positively to explanations even when those explanations lack substantial meaning.

The authors also address common deceptive responses, including selective memory claims and exclusion qualifiers like “not really” or “basically.” Rather than directly challenge, they recommend strategic follow-up questions that compel individuals to expand or clarify their responses without creating defensive psychological positions. Overall, the authors’ approach represents a departure from confrontational interrogation styles that dominated earlier eras of criminal investigation. Their emphasis on nonconfrontational methods reflects the counterproductive nature of aggressive questioning techniques.

Chapter Lessons

• Deceptive individuals begin with an inherent advantage because they control the information being sought, making it essential to employ strategic questioning techniques rather than direct confrontation.
• Psychological entrenchment occurs when people repeatedly verbalize lies, making those false narratives progressively easier to maintain and harder to abandon.
• Question prologues that include legitimacy statements, rationalization, and blame projection can significantly increase the likelihood of truthful responses by providing psychological justification for disclosure.
• Broadening focus through presumptive questions can reveal additional information by steering conversations away from narrow, rehearsed responses toward unexplored areas of potential deception.

Reflection Questions

• Have you ever found yourself in a situation where repeatedly asking the same question seemed to make someone more resistant to answering truthfully? How might the concept of psychological entrenchment explain this dynamic?
• When you need important information from someone who seems reluctant to share it, what strategies do you currently use, and how do they compare to the nonconfrontational approaches described in this chapter?