瞳孔径の変化を用いた虚偽検出手法における新規指標の開発

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  • Development of a New Index for Lie Detection using Changes in Pupil Diameter

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<p>In recent years, new indicators focusing on cognitive activities have been developed for the purpose of improving the accuracy of lie detection tests. It has been pointed out that eye movement is particularly effective. In addition, there have been many reports of lie detection based on gaze movements and blinks. But these indicators are greatly influenced by human intentional control. In this study, we focus on the pupil diameter, which is difficult for humans to control intentionally. we verify whether it can be used a new index of lie detection method. In this experiment, we analyzed changes in pupil diameter when presenting a critical question and a non-critical question in a CIT issue. As a result, when the pupil diameter was dilated at the time of question presentation, the pupil diameter at the time of presentation of the critical question was smaller than that at the time of non-critical question presentation. This is because the cognitive load is suppressed by making the participants unaware of the contents when the critical question is presented. This result suggests that the pupil diameter can be used as a new index in the lie detection method.</p>

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