Rapid-fire questioning: Ask rapid-fire questions that require the person to think on their feet. This can disrupt their ability to maintain a fabricated story.
Memory overloading: Present the person with a complex task or series of questions that overload their working memory. This can make it harder for them to keep track of their lies.
Unexpected interruptions: Interrupt the person during their story with unrelated questions or tasks. This can disrupt their thought process and make it harder for them to maintain their deception.
Eye movement monitoring: Pay attention to eye movements. Liars may avoid direct eye contact or exhibit unusual eye movements.
Facial expression analysis: Look for microexpressions, brief facial expressions that can reveal true emotions. Liars may display these expressions even if they're trying to conceal their emotions.
Body language analysis: Observe body language cues, such as fidgeting, excessive gesturing, or changes in posture. Liars may display these cues when they're feeling anxious or uncomfortable.
Physical contact: Studies suggest that physical contact, such as touching the person's arm or shoulder, can increase their anxiety and make them more likely to slip up in their lies.
Encourage details: Ask the person to elaborate on specific details of their story. Liars may have difficulty providing specific and consistent details.
Use of props: Introduce unexpected props or objects during the conversation. Liars may react in unexpected ways when confronted with something unexpected.
Remember that these techniques may not always be foolproof, and it's important to evaluate the totality of the person's behavior, verbal cues, and non-verbal cues to make an accurate assessment.