lie detection

Lie detection involves assessing whether a person is truthful or deceptive by analyzing physiological and behavioral responses. Techniques like polygraphs measure indicators such as heart rate, blood pressure, respiration, and skin conductance, which may change when a person is lying due to nervousness or stress. Modern methods also include analyzing speech patterns, facial expressions, and microexpressions to detect inconsistencies. While not foolproof, these tools can provide clues about deception; however, they are typically used alongside other evidence and expert interpretation to make more informed judgments about honesty.