 |
||
 |
|
|
|
|
|
|
2020 年 3 月 2019 年 12 月 2018 年 12 月 2017 年 12 月 2016 年 |
2019 年 4 月The 46th Perceptual Frontier Seminar: Crossroads of Perceptual Psychology and NeurophysiologyDate and time: Friday, 5 April 2019, 16:00-18:00 Program16:00–16:30 Spatiotemporal brain mechanism of auditory and tactile time-shrinking Time-shrinking illusion occurs in several modalities in behavioral data (Arao et al, 2000; Nakjima et al, 2004; Hasuo et al, 2014). We investigated whether the time-shrinking illusion in different sensory modalities (i.e., auditory and somatosensory) share the common brain mechanism by using magnetoencephalogram. Both modality dependent/independent processes exist in different brain regions at different timing. 16:30–17:15 Deficits in visual and auditory perceptual organization in schizophrenia and ERP biomarkers Dr. Wang will give a talk about deficits in perceptual organization in patients with schizophrenia and other neuropsychiatric disorders. Both behavioral test and event-related potential (ERP) are used to investigate the neural mechanisms in them. For visual stimuli, it is found that schizophrenia did worse in both visual contours detection and occluded objects recognition tasks. Differences in P1, N1 (N170) and Ncl (negativity of closure, an ERP component epecially evoked by incomplete visual stimuli) can be found between groups. Similarly in auditory cases, schizophrenia did worse than controls in a detection task involving integration of auditory information. In this novel task, a break was inserted in one channel of audio stream consisted of white noise, so that a change in correlation between ears could be perceived through binoaural integration. Abnormality in gamma-band oscillation in schizophrenia could account for results in both tasks. Dr. Chen will talk about invasive and non-invasive brain machine interface and decoding motor information in both imagination and execution tasks. Deficits in perceiving fine movement will also be introduced in both schizophrenia and autism. 17:15–17:55 Students' Talks (1) Research about the role of time in summary statistics in visual perception When people observe things with their eyes, they always subconsciously judge the attributes of the whole and the individual elements involved. This is the basic ability of humans, and it is studied under the name “summary statistics”. When observing the attributes of things, there are basically two tasks: mean discrimination and member identification. Humans always use summary statistics to efficiently perceive the gist of groups of features. In this research, I study the influence of object presentation time on the use of summary statistics. (2) Influence of sound on motion perception in a stream-bounce stimulus Human being usually judge the surrounding environment mainly through the visual sense and the auditory sense, or by the integrated information from both senses. One way to study audiovisual integration is by means of the “stream-bounce” stimulus. According to previous research on this stimulus, when a pair of objects that look exactly the same move toward each other, overlap and then continue toward opposite ends of a space, some observers tend to perceive the objects as streaming through each other, while others thought they were bouncing off. Commonly, the streaming percept is dominant, but when a sound is presented at the overlap of the visual objects, the bouncing percept becomes dominant. There is a certain temporal window of integration that is linked to the stimulus, which leads to the concept of TOJ (temporal order judgement). I will study sound-induced bouncing and perform TOJ studies. (3) Irrelevance of stream segregation in cognitive temporal resolution (4) Swapping time segments in mosaic speech デザインと医療応用日時：2019 年 4 月 8 日（月），13:30-18:10 プログラムセッション 1: 知覚心理・生理とデザイン 13:30-13:55 色覚の多様性 セッション 2: 医療と応用 15:25-15:50 眼科手術ロボットの開発 セッション 3: モデリングと最適化 16:55-17:20 生命科学とモデリング 懇親会 |
|||
|
|
|
|
|
|
|
|
Last updated: |
||
|
|
|