Interpersonal Deception Theory

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Chapter 7

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Interpersonal Deception Theory

  1. 1. INTERPERSONAL DECEPTION THEORY IDT
  2. 2. 3 COMMON DECEPTION PRACTICES <ul><li>Falsification (create fiction) </li></ul><ul><li>Concealment (hide secret) </li></ul><ul><li>Equivocation (dodges the issue) </li></ul>
  3. 3. Theory <ul><li>Most people say they can spot deception; IDT says they cannot </li></ul><ul><li>Deception and deception detection is INTERACTIVE ( co-constructed ) rather than INDIVIDUAL </li></ul><ul><li>Interactants constantly adjust their behavior to the other </li></ul><ul><li>Deception lies in motive not action and has at least three aims: instrumental goal; relationship; save face </li></ul>
  4. 4. KEY CONCEPTS <ul><li>Cognitive overload: deceiver may exhibit (non-verbal) non-strategic display </li></ul><ul><li>Leakage: unconscious nonverbal cues signaling an internal state </li></ul>
  5. 5. MESSAGE CHARACTERISTICS <ul><li>Uncertainty and vagueness </li></ul><ul><li>Non-immediacy, reticence and withdrawal </li></ul><ul><li>Disassociation or distancing </li></ul><ul><li>Image- and relationship-protecting behavior </li></ul>
  6. 6. LEAKAGE <ul><li>Too slick performances </li></ul><ul><li>Psychological arousal </li></ul><ul><li>Guilt and anxiety </li></ul><ul><li>Cognitive overload leading to uncontrolled NVC behavior </li></ul><ul><li>Decline of performance over time </li></ul>
  7. 7. RESPONDENT’S DILEMMA <ul><li>Expectation of honesty </li></ul><ul><li>Suspicion is resisted </li></ul><ul><li>Doubt is expressed indirectly </li></ul><ul><li>Indirect probes have uncertain value </li></ul>
  8. 8. RESPONDING TO SUSPICION <ul><li>Respondent’s suspicions can be seen through non-typical behaviors </li></ul><ul><li>Deceivers usually better at deceiving suspicion than respondents are at detecting deception </li></ul><ul><li>Deceivers try to reciprocate mood and manner of the respondent </li></ul><ul><li>Truth-tellers react the same way as deceivers to suspicion: hence the “Othello error” </li></ul>
  9. 9. CRITIQUE <ul><li>Potential contradictions between propositions (1) that NVC cues not reliable indicators of deception (2) that deceivers exhibit more leakage than truth tellers (3) that truth tellers exhibit similar behavior as deceivers when under suspicion (4) that deceiver’s success depends on level of receiver’s suspicion </li></ul>
  10. 10. ISSUES <ul><li>Does guilt level rise with familiarity? </li></ul><ul><li>Does familiarity produce more trust or more suspicion? </li></ul><ul><li>Do people in close relationships overestimate the other’s knowledge and/or suspicion of them? </li></ul>

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