Confidence Without Clarity

General Audience Summary
Detecting deception is a vital skill in law enforcement, legal settings, and even daily
interactions, but our understanding of how confidence influences accuracy is limited. This study
reveals that people who are extremely confident—or not confident at all—in their ability to spot
lies are often less accurate than those with a balanced self-assessment. Traditional methods of
relying on body language and other behavioral cues often lead to errors, particularly across
cultural boundaries. Emerging tools, such as AI-driven linguistic analysis, show significant
promise in improving accuracy and fairness. This research highlights how bias and
overconfidence can undermine decision-making and offers practical strategies for improving
training and policies to make investigative practices more ethical and effective