Investigation of the human visual system by phychophysical and fMRI experiments

通过物理物理学和功能磁共振成像实验研究人类视觉系统

• 批准号: 13490016
• 负责人: KITA Shinichi
• 金额: $ 7.87万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13490016/
• 关键词: vision; object recognition; space perception; psychophysics; fMRI; virtual reality; eye movements; temporal-order judgment; 実験心理学; 脳科学; バーチャルリアリティ; ベクション

This research was aimed to investigate the human visual system by using psychophysical and fMRI experiments. In the psychophysical experiments, we used apparent self-motion, vection, elicited by viewing full-field motion presented by an evasive type virtual reality system (CAVE).1. Eye movements of the observers were recorded to examine the contribution of optokinetic nystagmus on the feeling of vection. Results indicated that the beating field during vection was found to displace to the perceived heading direction in proportion to the strength of vection. This displacement preceded the difference in the subjective estimation of the strength of vection between viewing conditions. Thus the strength of vection was estimated by measuring the beating field of optokinetic nystagmus even before the actual observation of the subjective estimation of vection.2. Each repertoire of the human senses has its specialty. While spatial superiority of vision over audition causes ventriloquism illusion, temporal superiority of audition over vision does cross-modal interactions that humans make a mistake in perceiving temporal characteristics of visual events with overlapped tones. We showed a phenomenon opposite to these biases; visual input modifies the perception of temporal characteristics of tones. In the experiment observers made a biased judgment of the temporal-order of two tones presented successively when they felt apparent self-motion (vection) by viewing full-field motion of a visual display presented by a virtual reality system. This result indicated that apparent self-motion plays an influential role in temporal perception.

本研究旨在通过心理物理和功能磁共振实验来研究人类的视觉系统。在心理物理实验中，我们使用了通过观看闪避型虚拟现实系统(CAVE)呈现的全场运动而引发的表观自我运动，即向量。观察者的眼动被记录下来，以检查视动性眼球震颤对视觉感觉的贡献。结果表明，向量过程中的拍击场向感知的航向方向移动，与向量的强度成正比。这种位移先于对观看条件之间的视向强度的主观估计的差异。因此，甚至在主观估计向量的实际观察之前，就通过测量视动性眼球震颤的搏动场来估计向量的强度。人类感官的每一个曲目都有自己的特点。视觉对听觉的空间优势会导致腹语错觉，而听觉对视觉的时间优势会产生跨通道交互作用，人类在感知具有重叠音调的视觉事件的时间特征时会犯下这种错误。我们发现了一个与这些偏见相反的现象：视觉输入改变了对音调时间特征的感知。在实验中，观察者通过观看虚拟现实系统呈现的视觉显示器的全场运动，对连续呈现的两个音调的时间顺序做出了有偏见的判断。这一结果表明，表观自我运动在时间知觉中起着重要作用。

项目成果

寺本渉 他: "視運動性眼振を指標とした視覚誘導性自己運動間隔の他覚的評価"日本バーチャルリアリティ学会論文誌. 9(1). 51-60 (2004)

Wataru Teramoto 等人：“使用视动眼球震颤作为指标对视觉引导的自我运动间隔进行客观评估”，日本虚拟现实学会杂志 9(1) (2004)。

喜多伸一, 他: "視運動性眼振を指標とした視覚誘導性自己運動感覚の他覚的評価"日本バーチャルリアリティ学会論文誌. 印刷中.

Shinichi Kita 等人：“使用视动眼球震颤作为指标对视觉引导的自我运动感觉进行客观评估”，日本虚拟现实协会杂志正在出版。

Teramoto, W. et al.: "Temporal order judgments of auditory events during apparent self-motion."Proceedings of International Congress of Psychology. 28(未定). (2004)

Teramoto, W. 等人：“明显自我运动期间听觉事件的时间顺序判断”，《国际心理学大会论文集》28 (TBD)。

Teramoto, W.: "The effect of apparent self-motion perception on the oculomotor performance."Proceedings of Asian Conference of Vision. 2. 76 (2002)

Teramoto, W.：“明显的自我运动感知对动眼神经性能的影响。”亚洲视觉会议论文集。

Teramoto, W. et al.: "Judgment biases of temporal order during apparent self-motion."IEICE Transaction on Information and Systems. 87(6)(未定). (2004)

Teramoto, W. 等人：“表观自运动过程中时间顺序的判断偏差。”IEICE Transaction on Information and Systems (信息与系统) 87(6)(TBD)。