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Nonverbal Betrayal of Feelings Albert Mehrabain

Nonverbal Betrayal of Feelings Albert Mehrabain. Presented by Payton Ong April 25, 2005. Hypothesis. Some behaviors are unwittingly emitted when a person is deliberately deceptive Exhibits positive head nodding less frequently Smiles more

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Nonverbal Betrayal of Feelings Albert Mehrabain

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  1. Nonverbal Betrayal of FeelingsAlbert Mehrabain Presented by Payton Ong April 25, 2005

  2. Hypothesis • Some behaviors are unwittingly emitted when a person is deliberately deceptive • Exhibits positive head nodding less frequently • Smiles more • Speaks at a slower rate and speaks fewer words with more frequent errors

  3. Experiment I • Subjects communicate both truthfully and deceitfully • Each subject gives a presentation on both advocating and condemning abortion. • Additional money incentive for success and pain punishment for failure.

  4. Results of Experiment I • Each dependent measure analyzed using 2X2X14X2 factorial design. • Males have more pleasant face while deceitful. • Females have a higher sitting rocking movement race while given a reward for truth. • Longer speech duration if given reward for truth.

  5. Table of Results I

  6. Experiment II • Deceitful versus truthful quality of verbal communication • Given specific and abstract issues, subjects try to: • Tell the truth so that the listener believes the subject is telling the truth • Tell the truth such that the listener believes the subject is telling a lie • Lie such that the listener believes the subject is telling the truth • Lie such that the listener believes the subject is telling a lie.

  7. Results of Experiment II • Analyzed using a 2X2X12X2X2 factorial design. • Males less immediate if introverted. • Face is more pleasant if acting to lie while actually lying • Males gesture more if introverted while telling the truth. Females gesture more if extroverted and telling the truth. • More head nodding if acting to lie while actually telling the truth.

  8. Table of Results II

  9. Experiment III • Maximize a subject’s desire to lie without being caught. • Given an ESP test with an, unknown to the subject, experimenter • Experimenter either tries or does not try to cheat. But test always ends with ESP true result. • Subject is questioned about ESP result.

  10. Results of Experiment III • Analyzed using a 2X2X8 factorial design. • Subjects more relaxed if extroverted. • Speech rate is quicker if deceitful. • Speech volume is higher if subject has low anxiety (introverted). • Higher percentage of talking during conversation if truthful.

  11. Table of Results III

  12. Conclusion • Eye Contact • Facial expressions • Speech duration • Body movements • Head nodding

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