...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Neurophysiology >Early information processing contributions to object individuation revealed by perception of illusory figures
【24h】

Early information processing contributions to object individuation revealed by perception of illusory figures

机译：虚幻人物的感知揭示了早期信息处理对物体个体化的贡献

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To isolate multiple coherent objects from their surrounds, each object must be represented as a stable perceptual entity across both time and space. Recent theoretical and empirical work has proposed that this process of object individuation is a mid-level operation that emerges around 200-300 ms after stimulus onset. However, this hypothesis is based on paradigms that have potentially obscured earlier effects. Furthermore, no study to date has directly assessed whether object individuation occurs for task-irrelevant objects. In the present study we used electroencephalography (EEG) to measure the time course of individuation, for stimuli both within and outside the focus of attention, to assess the information processing stage at which object individuation arises for both types of objects. We developed a novel paradigm involving items defined by illusory contours, which allowed us to vary the number of to-be-individuated objects while holding the physical elements of the display constant (a design characteristic not present in earlier work). As early as 100 ms after stimulus onset, event-related potentials tracked the number of objects in the attended hemifield, but not those in the unattended hemifield. By contrast, both attended and unattended objects could be individuated at a later stage. Our findings challenge recent conceptualizations of the time course of object individuation and suggest that this process arises earlier for attended than unattended items, implying that voluntary spatial attention influences the time course of this operation.
机译：为了从其周围隔离多个相干对象，必须将每个对象表示为在时间和空间上都稳定的感知实体。最近的理论和经验工作提出，对象个体化的过程是一个中级操作，在刺激发生后约200-300 ms出现。但是，此假设基于可能掩盖了早期影响的范例。此外，迄今为止，尚无研究直接评估与任务无关的对象是否发生了对象个体化。在本研究中，我们使用脑电图（EEG）来测量个体化的时间过程，以用于关注焦点内外的刺激，以评估信息处理阶段，在该信息处理阶段，两种类型的物体都会出现个体化。我们开发了一种新颖的范式，涉及由虚幻的轮廓定义的项目，这使我们能够在保持显示的物理元素不变的情况下改变待个体化对象的数量（早期工作中不存在的设计特征）。最早在刺激发生后100毫秒，与事件相关的电位就跟踪了参与的半场中物体的数量，但未跟踪无人参与的半场中物体的数量。相比之下，有人参加和无人参加的对象都可以在以后的阶段进行个性化处理。我们的发现挑战了对象个体化的时间过程的最新概念，并建议此过程比有人照看的项目出现得早，这意味着自愿的空间注意会影响此操作的时间过程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号