Detecting deception using comparable truth baselines

Glynis Bogaard*, Ewout H. Meijer, Aldert Vrij, Galit Nahari

*Corresponding author for this work

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Abstract

Baselining – comparing the statements of interest to a known truthful statement by the same individual – has been suggested to improve lie detection accuracy. A potential downside of baselining is that it might influence the characteristics of a subsequent statement, as was shown in previous studies. In our first experiment we examined this claim but found no evidence that a truthful baseline influenced the characteristics of a subsequent statement. Next, we investigated whether using a truthful baseline statement as a within-subject comparison would improve lie detection performance by investigating verbal cues (Experiment 1) and intuitive judgements of human judges (Experiment 2). Our exploratory analyses showed that truth tellers included more auditory and temporal details in their target statement than in their baseline than liars. Observers did not identify this verbal pattern. Exposure to a truthful baseline statement resulted in a lower truth accuracy but no difference in lie accuracy.
Original languageEnglish
Number of pages17
JournalPsychology, Crime & Law
Early online date22 Jan 2022
DOIs
Publication statusEarly online - 22 Jan 2022

Keywords

  • baselining
  • verbal credibility assessment
  • cues to deception
  • lie detection accuracy

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