MODELS OF STIMULUS UNCERTAINTY IN MOTION PERCEPTION
MODELS OF STIMULUS UNCERTAINTY IN MOTION PERCEPTION
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DOI：
10.1037/0033-295x.87.5.435
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发表时间：
1980-01-01
影响因子：
5.4
通讯作者：
SEKULER, R
中科院分区：
文献类型：
--
作者：
BALL, K;SEKULER, R
提出了一个模型，用于解释当观测者不确定目标的运动方向时，运动目标的可见性损失。为了响应关于两个可能运动方向的不确定性，假定观察者使用的机构的峰值灵敏度是介于两个可能方向之间的一个方向。使用反应时和强迫选择数据的七个实验(观察者是7个幼稚的SS和第一个作者)证明了这种中途模型比竞争的单波段和多波段模型具有预测优势。这些实验揭示了人类运动感知的几个新特性：(A)方向和速度信息在视觉系统中具有正交表示；(B)尽管运动敏感度不随方向变化，但识别方向微小变化的精确度确实反映了对不同方向敏感的方向选择机构的不同调谐幅度；以及(C)运动分析机构针对方向和速度进行了广泛的调整。
Proposed a model to account for the loss in visibility of moving targets that occurs when an observer is uncertain about the target's direction of motion. In response to uncertainty about 2 possible directions of motion, the observer is assumed to use a mechanism whose peak sensitivity is to a direction midway between the 2 possible directions. Seven experiments (observers were 7 naive Ss and the 1st author), using both reaction time and forced-choice data, demonstrate the predictive advantages of this midway model over competing single-band and multiple-band models. The experiments reveal several new properties of human motion perception:(a) direction and velocity information have orthogonal representations in the visual system;(b) although motion sensitivity does not vary with direction, the precision with which small changes in direction can be recognized does, reflecting differential breadth of tuning for directionally selective mechanisms sensitive to various directions; and (c) motion-analyzing mechanisms are broadly tuned for direction as well as speed.(47 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)