본 연구에서는 고가의 상용화 기기를 대신할 수 있는 보급형 안구운동추적 장치를 개발하는 과정을 소개하고, 개발된 장치의 타당성을 검토하였다. 연구 1에서는 저가형 웹 카메라, 적외선 조명, 및 컴퓨터로 구성된 안구운동추적 장치를 설치하는 과정을 기술하고, 보정과정을 거친 후 예시 디지털 이미지를 참가자에게 제시하여 안구운동 패턴을 알아보았다. 연구 2에서는 Levin과 Simons(1997)의 변화맹시 연구를 반복검증하기 위해 변화단서의 제시 유무를 조작하여 안구운동추적 자료를 수집하였다. 실험 결과, 변화단서 제시조건이 비 제시조건에 비해 평균 응시점 개수가 92% 많아졌고, 최대 응시시간은 58% 짧아졌음을 관찰할 수 있었다. 마지막으로, 저비용 안구운동추적 장치의 제한점과 향후 개선방향에 대해서 논의하였다.
This study introduced the development of a ‘low-cost eye-tracking device’ using a common web camera, an infra-red light, and PC. Two experiments were conducted to validate the utility of the eye-tracking device. In experiment 1, using a 25 fixation point display and an artificial face, the spatial resolution of the device was examined. In experiment 2, manipulating the presence/absence of the change-cue, we tried to replicate the change-blindness experiment by Levin & Simons(1997), and examined the eye-movement patterns for each condition. As results, it was observed that the number of fixation points in the change-cue condition were 92% higher, and the maximum fixation-dwelling time were 58% shorter than those in the no-cue condition. Finally, limitations and future developments of a low-cost eye-tracking device were discussed.
This study introduced the development of a ‘low-cost eye-tracking device’ using a common web camera, an infra-red light, and PC. Two experiments were conducted to validate the utility of the eye-tracking device. In experiment 1, using a 25 fixation point display and an artificial face, the spatial resolution of the device was examined. In experiment 2, manipulating the presence/absence of the change-cue, we tried to replicate the change-blindness experiment by Levin & Simons(1997), and examined the eye-movement patterns for each condition. As results, it was observed that the number of fixation points in the change-cue condition were 92% higher, and the maximum fixation-dwelling time were 58% shorter than those in the no-cue condition. Finally, limitations and future developments of a low-cost eye-tracking device were discussed.
