W8 Detecting Deception pt 2 Flashcards
What are common non-verbal signs of deception?
Signs of nervousness, gaze aversion (looking away), and increased body movements or fidgeting.
What are common verbal signs of deception?
Reduced detail in speech content and errors in speech content.
What typical method is used to study deception detection?
Have subjects tell lies and truths, then ask observers (ordinary people, police, etc.) to identify the lies.
Why do professionals struggle with detecting deception?
Lack of interaction with suspects, insufficient stakes in the scenario, and reliance on incorrect cues.
What percentage accuracy did professionals achieve in detecting deception according to Hartwig et al. (2004)?
56.7%
What are common misconceptions about signs of lying?
Increased gaze aversion and fidgeting are often misinterpreted as signs of lying; they may indicate other emotions like anxiety.
What factors contribute to lying?
Emotions (guilt, fear), cognitive effort (complex details), and attempted behavior control (e.g., trying not to fidget).
Can lie detection be improved?
Yes, through training to look for specific markers and using techniques like active interviewing and increasing cognitive load.
What is the benefit of increasing cognitive load in interviews?
It can lead to more errors and pauses from liars, improving detection rates.
What are potential drawbacks of increasing cognitive load?
It may generate inaccurate information from truth-tellers, especially if their memory is poor, and effectiveness might depend on their working memory capacity.
How do unanticipated questions affect lie detection?
They can reduce the advantage liars have in preparing for interviews, making it cognitively easier for truth-tellers and increasing error rates for liars.
What accuracy rates can be achieved with unanticipated questions in interviews?
Up to 80% accuracy in detecting lies.
