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LIE DETECTION ACCURACY PowerPoint Presentation
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LIE DETECTION ACCURACY

LIE DETECTION ACCURACY

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LIE DETECTION ACCURACY

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  1. LIE DETECTION ACCURACY

  2. WITHOUT EQUIPMENT AND STRANGERS AS TARGETS, 50-60% IS THE USUAL LEVEL OF ACCURACY • WHY AREN’T WE BETTER? • Our Evolutionary Past Didn’t Prepare Us • Our Parents Often Don’t Teach Us • Trust Enriches Life More Than Suspicion • We Often Want To Be Misled • We Are Often Taught To Be Polite • Nature of Decoding Task

  3. WHY AREN’T PROFESSIONAL LIE DETECTORS BETTER? • High Base Rate of Liars (+/-75%) • Not As Interested In Spotting Liars As Getting Evidence to Convict • Feedback on Mistakes Is Too Late And Far Removed From Original Judgment To Be of Much Value in Learning

  4. HIGHEST DETECTION RATES • Secret Service Officers • High Stakes Lies • Aphasics • DETECTORS MAY KNOW MORE THAN ACCURACY RATES SUGGEST • THOSE WHO ARE EXTREMELY EFFECTIVE DETECTORS DO NOT HAVE AS MANY FRIENDS OR AS SATISFYING RELATIONSHIPS AS THOSE WHO ARE ONLY MODERATELY ACCURATE.

  5. DETECTION VARIABLES • DOES FOREWARNING INCREASE ACCURACY? • DOES EXPERIENCE WITH POTENTIAL LIARS INCREASE ACCURACY? • DOES KNOWLEDGE OF THE LIAR INCREASE ACCURACY? • ARE THERE “HONEST” FACES?

  6. DOES CULTURAL SIMILARITY OF LIAR AND DETECTOR INCREASE ACCURACY? • DOES PROBING INCREASE ACCURACY? • DO PERSONALITY CHARACTERISTICS OF LIAR AND DETECTOR AFFECT ACCURACY?

  7. DETECTION STRATEGIES FOR PROBING & INTERROGATION • INTIMIDATION • SITUATIONAL FUTILITY • DISCOMFORT AND RELIEF • BLUFF • GENTLE PRODS • MINIMIZATION • CONTRADICTION

  8. ALTERED INFORMATION • CHINK IN THE DEFENSE • POINT OUT DECEPTION CUES • CONCERN • KEEPING THE STATUS QUO

  9. PARENT-ADOLESCENT CHILD STRATEGIES FOR DETECTING DECEPTION • USED: INTIMIDATION, CONTRADICTION, GENTLE PRODS • ALSO USED: SELF-DISCLOSURE • PARENTS STUCK WITH STRATEGY EVEN IF IT DIDN’T WORK • DIFFERENT VERSION OF THE TRUTH BIAS

  10. ADOLESCENTS COULD IDENTIFY ABOUT 50% OF THEIR PARENT’S DETECTION STRATEGIES • THE DISCLOSURE TACTIC WAS NOT OFTEN IDENTIFIED

  11. INTERPERSONAL PERCEPTION TEST • #5 • WHICH PERSON IS TELLING A LIE? • A. THE MAN IS LYING, THE WOMAN IS TELLING THE TRUTH • B. THE MAN IS TELLING THE TRUTH, THE WOMAN IS LYING • C. BOTH THE MAN AND THE WOMAN ARE LYING

  12. #9 • YOU WILL SEE THE SAME WOMAN IN TWO SCENES. WHICH IS THE LIE AND WHICH IS THE TRUTH? • A. THE FIRST IS A LIE, THE SECOND IS THE TRUTH • B. THE FIRST IS THE TRUTH, THE SECOND IS A LIE

  13. #15 • WHICH IS THE LIE AND WHICH IS THE TRUTH? • A. THE FIRST IS A LIE, THE SECOND IS THE TRUTH • B. THE FIRST IS THE TRUTH, THE SECOND IS A LIE

  14. #19 • WHICH IS THE LIE AND WHICH IS THE TRUTH? • A. THE FIRST IS A LIE, THE SECOND IS THE TRUTH • B. THE FIRST IS THE TRUTH, THE SECOND IS A LIE

  15. #24 • WHICH IS THE LIE AND WHICH IS THE TRUTH? • A. THE FIRST IS A LIE, THE SECOND IS THE TRUTH • B. THE FIRST IS THE TRUTH, THE SECOND IS A LIE

  16. #30 • WHICH IS THE LIE AND WHICH IS THE TRUTH? • A. THE FIRST IS A LIE, THE SECOND IS THE TRUTH • B. THE FIRST IS THE TRUTH, THE SECOND IS A LIE • C. BOTH ARE LIES