안구운동 추적장비를 통한 거짓말자의 동공크기 및 안구운동 연구

초록

The present study aimed to examine a change in pupil size and the eye movement during deception. Participants were recruited for either guilty (25 people) or innocent (27 people) group and performed a mock crime. After the mock crime, participants' pupil size and eye movements (fixation count and dwell time) were measured during the comparison question test. During the comparison question test, nine sentences (two crime-related questions, three comparison questions, four irrelevant questions) were presented on the monitor connected with eye tracker. The findings indicated that the guilty group showed significantly larger pupil size when the crime-relevant questions were given than did the innocent group while two groups showed no difference in fixation count and dwell time. The findings revealed that pupil dilation was different between liars and truth tellers, and thus, pupil dilation can be a useful measurement to detect deception and may contribute to an increase of the accuracy of lie detection.

키워드