| Budget Amount *help |
¥27,950,000 (Direct Cost: ¥21,500,000、Indirect Cost: ¥6,450,000)
Fiscal Year 2014: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2013: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Fiscal Year 2012: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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| Outline of Final Research Achievements |
Adaptation and aftereffect in various aspects of visual perception were studied, e.g., appearance of afterimages, perceptual shape changes after adaptation, motion aftereffects of illusory motion. We have found that afterimages are not simple fatigue of photo receptors on the retina but reflections of brain activities. Perceptual shapes of afterimages are sometimes different from adapted shapes. The afterimages repeat appearing, disappearing and reappearing. We found that this is caused by mutual inhibition between basic visual elements, such as combinations of color and orientation. By measuring adaptation and aftereffect, we have revealed that illusory flow perception arising in an op art painting is determined by relative motion detection mechanisms. We also investigated learning in saccades while viewing a repeated motion sequence that caused position illusions. The results of these experiments show the effectiveness of adaptation and aftereffects to study brain activities.
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