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Detecting Lies via a Theme-Selection Strategy.

Nicola Palena1, Letizia Caso1, Aldert Vrij2

  • 1Department of Human and Social Sciences, University of Bergamo, Bergamo, Italy.

Frontiers in Psychology
|January 29, 2019
PubMed
Summary
This summary is machine-generated.

Investigating deception, this study found that comparing details within a single interview (within-subjects) is more effective than comparing entire interviews (between-subjects). This method helps identify liars and pinpoint false statements in deception detection.

Keywords:
HUMINT interviewingTheme-Selection strategyinvestigative interviewinglie detectionstrategic interviewingwithin-subjects comparisons

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Area of Science:

  • Psychology
  • Forensic Science
  • Behavioral Analysis

Background:

  • Deception research often dichotomizes statements as entirely true or false.
  • Real-world deception frequently involves a mixture of truths and lies.
  • Existing methods may overlook nuanced deception within single interviews.

Purpose of the Study:

  • To evaluate the effectiveness of within-subjects comparisons for deception detection.
  • To determine if analyzing thematic differences within an interview improves accuracy.
  • To explore the utility of a Theme-Selection strategy in identifying deception.

Main Methods:

  • Seventy-three participants were instructed to either tell the truth about two themes or lie about one theme in a Human Intelligence (HUMINT) context.
  • A within-subjects design was employed, comparing details across different themes within the same interview.
  • Data analysis focused on the amount of detail provided for each theme.

Main Results:

  • Within-subjects comparisons, utilizing a Theme-Selection strategy, yielded stronger results than between-subjects analyses.
  • The amount of detail varied significantly across themes within interviews.
  • This approach proved more effective in discriminating truth-tellers from liars.

Conclusions:

  • Within-subjects measurements are highly effective for deception detection.
  • Analyzing thematic variations within interviews can pinpoint specific false statements.
  • The Theme-Selection strategy offers a robust method for nuanced deception analysis.