Visual illusions : perception of luminance, color, and motion in humans
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Over the past centuries studies on visual illusions have provided us with a better understanding of the human visual system. The aim of this thesis is to contribute to this research field by utilizing visual illusions as research tools. In several psychophysical experiments and qualitative approaches I try to realize this aim. Since the human visual system is complex and processing mechanisms are highly interactive in networks, I will not focus on a single field but rather investigate a whole series of visual illusions. The thesis is divided into three major threads: 1. phenomena of fading and filling-in; 2. geometric-optical illusions, luminance illusions, and color illusions at conditions of luminance contrast and isoluminance with chromatic contrast; 3. apparent motion illusions. These studies expand our knowledge on various processing mechanisms from low-level (retina) to higher-levels of the visual cortex (V5/MT, MST). The results of the studies are interpreted and discussed within the context of current research work in the field of Vision Sciences. Furthermore, I present some new visual (illusory) phenomena, which could serve as valuable tools for future research in psychophysical, physiological, or brain imaging studies.Verknüpfung zu Publikationen oder weiteren Datensätzen
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Gestalt Theory, 27 (2005), S. 155-163; Vision Research, 46 (2006), S. 1029-1038; Vision Research, 46 (2006), S. 4252-4257; Vision Research, 46 (2006), S. 3267-3273; Perception, 35 (2006), S. 853-857