ISSN : 1226-9654
본 연구의 목적은 Pulfrich 효과와 양안부등 그리고 SFM (structure-from-motion)이 하나의 공통된 기제에 의하여 처리되는 지를 검증하는 것이었다. 양안부등과 Pulfrich 효과 단독 또는 둘의 조합에 의하여 정의되는 순응자극인 무선점 반투명1) 원통체의 회전방향에 피험자를 순응시킨 후, SFM 기법에 의하여 회전방향이 모호하게 정의된 순응검사자극인 원통체의 회전방향을 보고하게 하였다. 양안부등 및 Pulfrich 효과에 의해 정의된 원통체에 노출된 피험자들은 순응자극의 회전방향과 반대로 순응검사자극이 회전하는 것으로 지각하였다. 뿐만 아니라, 순응자극이 Pulfrich 효과와 양안부등에 의해 상이한 방향으로 회전하도록 정의된 경우에, 순응효과는 양안부등과 Pulfrich 효과의 상대적인 강도에 따라서 체계적으로 달리 나타났다. 이러한 실험결과는 양안부등, Pulfrich 효과 그리고 SFM이 공통의 신경생리학적 기제에 의해 처리됨을 시사한다.
The purpose of the present research was to examine whether Pulfrich effect, binocular disparity and SFM (structure-from-motion) were processed by a common neurophysiological mechanism. Subjects adapted to a rotating semitransparent random dot cylinder whose rotation direction was defined by binocular disparity, Pulfrich effect or combination of them and reported the rotation direction of adaptation test stimulus, another rotating cylinder whose rotation direction was ambiguously defined by SFM. Subject perceived that the test stimulus rotated in the direction opposite to that of adapting stimulus defined by binocular disaprity or Pulfrich effect. Interestingly, the adaptation effect changed systematically depending on the relative strength of binocular disparity and Pulfrich effect when the directions of adapting stimuli defined by them are in conflicts. These results imply that binocular disparity, Pulfrich effect and SFM are processed by a common neurophysiological mechanism.
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