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Microexpressions Differentiate Truths From Lies About Future Malicious Intent.

David Matsumoto1,2, Hyisung C Hwang1,2

  • 1Department of Psychology, San Francisco State University, San Francisco, CA, United States.

Frontiers in Psychology
|January 9, 2019
PubMed
Summary
This summary is machine-generated.

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Microexpressions, brief facial emotional displays, can indicate deception. This study found specific durations of negative microexpressions reliably differentiate truth-tellers from liars regarding future malicious intent.

Area of Science:

  • Psychology
  • Nonverbal Communication
  • Forensic Science

Background:

  • Previous research on microexpressions as indicators of deception yielded inconsistent results.
  • Inconsistent findings may stem from overly narrow definitions of microexpression duration.
  • Understanding microexpression timing is crucial for accurate deception detection.

Purpose of the Study:

  • To systematically investigate the role of microexpression duration in differentiating truth-tellers from liars.
  • To test various operationalized durations of microexpressions, including ≤0.50s, ≤0.40s, ≤0.30s, and ≤0.20s.
  • To explore the potential of microexpressions in predicting future malicious intent.

Main Methods:

  • Facial expressions of emotion were coded for occurrence and duration in participants of a mock crime experiment.
Keywords:
checkpointsdeceptionfacial expressions of emotionmicroexpressionsveracity

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  • Microexpressions were defined as expressions lasting ≤0.50s, with further analysis at ≤0.40s, ≤0.30s, and ≤0.20s.
  • Comparisons included expressions between 0.50s-6.00s and all expressions ≤6.00s.

    • Main Results:

    • Microexpressions of negative emotions lasting ≤0.40s and ≤0.50s significantly differentiated truth-tellers from liars.
    • Expressions of negative emotions ≤6.00s also showed differentiation, but this effect diminished when shorter durations (≤1.00s) were excluded.
    • This study provides the first systematic evidence linking specific microexpression durations to deception detection.

    Conclusions:

    • Specific, short durations of negative microexpressions are potential indicators of deception.
    • The findings support the utility of microexpressions in assessing individuals' intent to commit future wrongdoing.
    • Further research should explore the precise temporal characteristics of microexpressions in deception.