유죄 및 무죄 집단 간 인지적 부하 및 정서적 각성 질문에 따른 동공크기의 변화의 차이The Difference in Pupil Size Responding to Cognitive Load and Emotional Arousal Questions between Guilty and Innocent Groups
- Authors
- 조아라; 김기호; 이장한
- Issue Date
- Jul-2020
- Publisher
- 한국법심리학회
- Keywords
- lie detection; pupil diameter; eye-tracker; cognitive load; emotional arousal; 거짓말 탐지; 동공크기; 웨어러블 아이트래커; 인지적 부하; 정서적 각성
- Citation
- 한국심리학회지:법, v.11, no.2, pp 155 - 171
- Pages
- 17
- Journal Title
- 한국심리학회지:법
- Volume
- 11
- Number
- 2
- Start Page
- 155
- End Page
- 171
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/43867
- DOI
- 10.53302/kjfp.2020.07.11.2.155
- ISSN
- 2093-3843
- Abstract
- The purpose of this study is to examine the effects of emotional arousal and cognitive load on pupil diameter during a lie detection interview. The guilty group (n = 30) committed a mock crime (i.e., stealing cash) and the innocent group (n = 30) performed a mission (i.e., sending a message) in the research assistant’s office. After that, their pupil size was measured using a wearable eye-tracker during the interview. The interview questions were classified with the three cognitive load, three emotional arousal, and three neutral questions. The results indicate that the main effects of group and time were not significant, but the interaction between group and time was significant. It means that when answering cognitive load questions, the guilty group showed larger increase in pupil diameter than the innocent group. The present study suggests that inducing cognitive load is more effective than inducing emotional arousal during an interview when using pupil diameter as an index of deception, and it is expected to improve the accuracy of lie detection.
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