The time-limited visual statistician.

The time-limited visual statistician.
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DOI:
10.1037/xhp0000255
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发表时间:
2016-10
期刊:
Journal of experimental psychology. Human perception and performance
影响因子:
--
通讯作者:
Vecera SP
Vecera SP
中科院分区:
其他
文献类型:
--
作者:
Attarha M;Moore CM;Vecera SP

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视觉系统可以计算一段时间内的汇总统计数据。例如,显示动态变化磁盘的电影的多个帧可以折叠以形成该磁盘平均大小的单个表示。动态信息的摘要表示可以参与在线更新过程,该在线更新过程通过与传入信息的到达一前一后地连续调整平均值的持续表示来建立平均值的运行平均值。或者,概要表示可能涉及子采样策略,该策略反映视觉系统可以随时间整合信息的程度的限制。观察者观看以不同速率平滑改变大小的磁盘的电影,然后通过调整响应磁盘的直径来报告磁盘的平均大小。关键是,这部电影的持续时间各不相同。大小估计取决于电影的持续时间。他们是恒定的,相当准确的电影持续时间高达约600毫秒,在这一点上的准确性下降,随着时间的推移,随着时间的推移建立的不精确的水平约1,000毫秒的摘要统计不太可能不断更新,而是可能会受到限制的二次采样过程,如有限的时间窗口的整合。
The visual system can calculate summary statistics over time. For example, the multiple frames of a movie showing a dynamically changing disk can be collapsed to form a single representation of that disk’s mean size. Summary representations of dynamic information may engage online updating processes that establish a running average of the mean by continuously adjusting the persisting representation of the average in tandem with the arrival of incoming information. Alternatively, summary representations may involve subsampling strategies that reflect limitations in the degree to which the visual system can integrate information over time. Observers watched movies of a disk that changed size smoothly at different rates and then reported the disk’s average size by adjusting the diameter of a response disk. Critically, the movie varied in duration. Size estimates depended on the duration of the movie. They were constant and fairly accurate for movie durations up to approximately 600 ms, at which point accuracy decreased with increasing duration to imprecise levels by about 1,000 ms. Summary statistics established over time are unlikely to be updated continuously and may instead be restricted by subsampling processes, such as limited temporal windows of integration.
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