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Related Experiment Videos

Pitch changes during attempted deception

L A Streeter, R M Krauss, V Geller

    Journal of Personality and Social Psychology
    |May 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

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    Men

    Area of Science:

    • Psychology
    • Linguistics
    • Acoustics

    Background:

    • Deception detection is a complex cognitive and linguistic process.
    • Vocal characteristics, such as fundamental frequency (pitch), may offer cues to deception.
    • Previous research has explored the relationship between vocal parameters and truthfulness.

    Purpose of the Study:

    • To investigate the relationship between voice fundamental frequency and deception in male college students.
    • To examine how auditory filtering of speech content affects truthfulness judgments based on vocal cues.

    Main Methods:

    • Two studies were conducted with 32 male college students.
    • Study 1 measured voice fundamental frequency during truthful and deceptive speech.
    • Study 2 involved judges rating the truthfulness of utterances from filtered (unintelligible content) and unfiltered audio recordings.

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    Main Results:

    • Average voice fundamental frequency was higher when subjects were lying compared to telling the truth.
    • On filtered tapes, higher fundamental frequency correlated with lower truthfulness ratings.
    • On unfiltered tapes, truthfulness ratings were not correlated with pitch.
    • Overall accuracy did not differ between conditions, but utterance elicitation method impacted accuracy.

    Conclusions:

    • Voice fundamental frequency can be an indicator of deception, particularly when semantic content is removed.
    • Auditory cues, independent of semantic meaning, play a role in lie detection.
    • The context and elicitation method of speech influence the reliability of vocal cues in deception detection.