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A Review of Automatic Lie Detection from Facial Features

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Abstract

The growth of machine learning and artificial intelligence has made it possible for automatic lie detection systems to emerge. These can be based on a variety of cues, such as facial features. However, there is a lack of knowledge about both the development and the accuracy of such systems. To address this lack, we conducted a review of studies that have investigated automatic lie detection systems by using facial features. Our analysis of twenty-eight eligible studies focused on four main categories: dataset features, facial features used, classifier features and publication features. Overall, the findings showed that automatic lie detection systems rely on diverse technologies, facial features, and measurements. They are mainly based on factual lies, regardless of the stakes involved. On average, these automatic systems were based on a dataset of 52 individuals and achieved an average accuracy ranging from 61.87% to 72.93% in distinguishing between truth-tellers and liars, depending on the types of classifiers used. However, although the leakage hypothesis was the most used explanatory framework, many studies did not provide sufficient theoretical justification for the choice of facial features and their measurements. Bridging the gap between psychology and the computational-engineering field should help to combine theoretical frameworks with technical advancements in this area.

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Notes

  1. The iBorderCtrl and AVATAR systems consist of several subsystems, one of which is dedicated to lie detection. The lie detection subsystems have been the subject of experimental studies. For iBorderCtrl, three studies are included in the current review dataset. For AVATAR, two studies were screened but not selected for the final dataset of the current review. See the Study selection and characteristics section for more details.

  2. This moderate effect-size estimate was based on a very small number of studies (DePaulo et al., 2003).

  3. The effect-size, calculated here by Cohen's d, gives an indication of the size of the difference observed between two groups, here people lying and telling the truth. When |d| ≈ 0.20 the difference is considered as small (not visible to the naked eye), when |d| ≈ 0.50 the difference is considered as medium, then when |d| ≈ or > 0.80 the difference is considered as large (Cohen, 1988).

  4. Authors mostly reported the accuracy in their studies. However, it is not possible to conduct a meta-analysis using only the accuracy value of the classifiers. Indeed, to perform a meta-analysis in the context of classification analyses, the confusion matrix obtained from the results of the classifier is needed. The confusion matrix allows the calculation of the log odds ratio, and the associated standard error (Cooper et al., 2009). However, the confusion matrices are not available in the studies selected, making a meta-analytic approach impossible.

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Acknowledgements

We would like to thank the anonymous reviewers for their constructive comments.

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Authors and Affiliations

Authors

Contributions

Conceptualization: H.D., N.D., V.D. Literature search: V.D., H.D, N.D. Data coding: H.D., N.D. Statistics and R programming: H.D. Writing and editing: H.D, N.D., V.D, J.B.

Corresponding author

Correspondence to Hugues Delmas.

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Conflict of interests

J.B is a founder of Discern Science International, a for-profit company that conducts credibility research and is the developer of the AVATAR. N.D. is a consultant to Discern Science International. The other authors report no conflict of interest.

Large Language Models

Large Language Models have been used by H.D. whose first language is French, to help translation from French to English, and to correct English.

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Delmas, H., Denault, V., Burgoon, J.K. et al. A Review of Automatic Lie Detection from Facial Features. J Nonverbal Behav 48, 93–136 (2024). https://doi.org/10.1007/s10919-024-00451-2

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  • DOI: https://doi.org/10.1007/s10919-024-00451-2

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