Eiji Watanabe Lab @ NIBB, Japan

Delta Model Delta Model Two types of signals (top-down and bottom-up) are assumed in this model.  Top-down signals are hypothesized to be derived from a higher level of the visual system and represent the predictive visual information.  Bottom-up signals are hypothesized to be derived from a lower level of the visual system and represent the original sensory information.  Subtraction occurs between the two signals; the resultant prediction error (delta) is input to a higher level of the visual system that operates the top-down signal to minimize the prediction error. Motion Aftereffect  can also be well explained by the subtraction algorithm in Delta Model, because the subtraction can induce the inverted motion direction observed in Motion Aftereffect. The same logic can be applied to various kinds of Aftereffect illusions. Please refer to the following paper for detail. Watanabe, E., Matsunaga, W., and Kitaoka, A., Motion signals defle...

 A Variation of Kebab Illusion Here, I show you new illusion, Kebab Illusion.  This illusion is a GIF animation which is composed of three frames. Time-line of Kebab Illusion You will percieve the illusory motion in the line.  At the same time, the pre-cue presented at the Frame 1 may shift in the direction of the motion. A Variation of Kebab Illusion Real and Percieved Plesase refer to the following paper and Prof Kitaoka's Web Page for detail. Watanabe, E., Matsunaga, W., and Kitaoka, A., Motion signals deflect relative positions of moving objects, Vision Research 50, 2381-2390 (2010) https://www.researchgate.net/publication/46578016_Motion_signals_deflect_relative_positions_of_moving_objects Prof Kitaoka's Web page http://www.psy.ritsumei.ac.jp/~akitaoka/movie7e.html

What do they see? Habituation to novel environments is frequently studied to analyze cognitive phenotypes in animals, and an open-field test is generally conducted to investigate the changes that occur in animals during habituation.  The test has not been used in behavioral studies of medaka (Oryzias latipes), which is recently being used in behavioral research.  Therefore, we examined the open-field behavior of medaka on the basis of temporal changes in 2 conventional indexes of locomotion and position.  The findings of our study clearly showed that medaka changed its behavior through multiple temporal phases as it became more familiar with new surroundings; this finding is consistent with those of other ethological studies in animals.  During repeated open-field testing on 2 consecutive days, we observed that horizontal locomotion on the second day was less than that on the first day, which suggested that habituation is retained in fish for days.  This tempora...

* Current member Eiji Watanabe (Associate Professor) Nozomi Nishiumi (Research fellow) Taisuke Kobayashi (Research fellow) * Past member Masaki Yasugi (Research fellow) Sachiko Aono (Visiting Scientist) Tomohiro Nakayasu (Research fellow) Wataru Matsunaga (Research fellow) Misuzu Yamada (Research fellow)

Refer to: ORCID https://orcid.org/0000-0001-9089-8122 or Google Scholar https://scholar.google.com/citations?user=K3d01L4AAAAJ&hl=en