Background: Academic research on deception detection has largely focused on the detection of past events. For many applied purposes, however, the detection of false reports about someone's intention merits attention. Based on the verbal deception detection paradigm, we explored whether true statements on intentions were more detailed and more specific than false statements on intentions, particularly when instructed to be as specific as possible. Method: Participants (n = 222) lied or told the truth about their upcoming travel plans either providing 'as much information as possible' (standard instructions) or being 'as specific as possible' (i.e., mentioning times, locations, places; specific instructions), resulting in four conditions (truthful vs. deceptive intention by standard vs. specific instructions). We collected data via a custom-made web app and performed automated verbal content analysis of participants' written answers. Findings: We did not find a significant difference in the specificity of participants' statements. The instruction to be as specific as possible promoted more specific information but did not help to discern honest from deceptive flying intentions.
Conclusion:The experiment reported here attempted to demonstrate automated verbal deception detection of intentions. The difficulty in capturing genuine intentions, and the non-intrusive, noninteractive questioning approach might explain the null findings and raise questions for further research. We conclude with suggestions for a novel framework on semi-interactive information elicitation. With an increased demand for security systems like airport border control, researchers and practitioners alike have identified the need for applications to detect deception on a large scale (Honts & Hartwig, 2014;Vrij, Granhag, & Porter, 2010). For example, the context of airport border control excludes many tools used in deception research due to their limited applicability. With developments towards more seamless passenger flows and minimal passenger-security personnel interaction, an ideal deception detection system would be implementable at stages even before passengers arrive at the airport (e.g., a filter system during online check-in processes, Kleinberg, Arntz, & Verschuere, in press). A promising paradigm that might be applicable in settings that require the testing of a vast number of people is verbal deception detection. However, because the majority of verbal deception detection studies were conducted on the verbal content of face-to-face interviews, a key challenge is the transition towards large-scale applicable methods. This paper reports an attempt to apply verbal deception detection tools on a large-scale in an airport security context.
Verbal deception detectionThe idea to use the verbal content as an indicator of deception is rooted in the Undeutsch Hypothesis (1967, 1982) stating that truthful statements differ from false declarations in quality and content because the process through which the particular statement is produced is d...