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Vision Science Lab
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The lab investigates the mechanisms of human vision through perceptual phenomena such as visual illusions.
AboutAbout the lab
Testing the wonders of how we see through experiments
The Vision Science Lab studies human sensation and perception, centered on vision, using the methods of experimental psychology.
Perceptual phenomena such as visual illusions are analyzed through psychophysical experiments and considered together with measurements of brain function using fMRI and other methods.
Assistant Professor Daiki Yamasaki's research areas are vision, audition, and multisensory perception.
Research themes have been decided to match students' interests, but themes that are related to visual perception in some way are expected.
Key terms
- Psychophysics
- A method for studying the relationship between stimuli and perception by gradually varying stimuli such as light and sound and measuring how people perceive them
- fMRI
- Functional magnetic resonance imaging. A device that shows which parts of the brain are active as images, based on changes in blood flow in the brain
- Visual illusion
- A phenomenon in which something looks different from its actual shape, color, or motion, such as a still picture that appears to move
- Attentional resources
- A way of describing the limited capacity for information processing, based on the idea that the amount of information a person can handle at once is limited, by likening that limited processing power to a resource
NewsLab news
Paper on the allocation of attentional resources between vision and hearing published online ahead of print in Psychologia
Paper on auditory dominance and individual differences in audiovisual tasks published in Japanese Journal of Cognitive Psychology
Paper on the rubber hand illusion published in Frontiers in Psychology
Paper on deviations in the perception of vertical published in Journal of Vision
Paper on the effect of irrelevant sounds on task performance published in Multisensory Research
ResearchResearch themes
The lab studies human sensation and perception, centered on vision, from the approach of experimental psychology. Centering on psychophysical experiments, it also examines brain function using fMRI.
Psychophysics of Visual Illusions
Perceptual phenomena such as visual illusions are analyzed on the basis of psychophysical experiments. In 2023, the lab published a paper on an illusion related to the speed of expansion and contraction (the zooming-speed illusion).
Perception of Facial Attractiveness
The lab investigates how facial attractiveness and impressions are perceived. One paper showed that large irises enhance the attractiveness of Japanese and Chinese women's faces, and graduation theses have addressed topics such as the effect of eyebrow position on the perceived size of the eyes and on facial impressions.
Interaction Between Vision and Hearing
The lab investigates how vision and hearing influence each other. In addition to a paper summarizing the effects of task-irrelevant sounds on task performance, graduation theses have addressed the effect of combined audiovisual presentation on visual memory.
Allocation of Attention Between Vision and Hearing
The lab investigates how attention is allocated when visual and auditory tasks are performed at the same time. In 2026, the lab published a paper arguing that the sharing of attentional resources between vision and hearing cannot be explained by a single factor, and a paper examining auditory dominance in audiovisual tasks and its individual differences.
MembersFaculty
The members of the Vision Science Lab consist of faculty, humanities collaborative researchers, part-time lecturers and postdoctoral researchers, and doctoral and master's students.As of 2026
- ProfessorHiroshi Ashida
- Assistant ProfessorDaiki Yamasaki
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