Temporal dynamics of saccadic distraction
Temporal dynamics of saccadic distraction
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DOI：
10.1167/9.9.17
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发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Sumner, Petroc
中科院分区：
文献类型：
--
作者：
Bompas, Aline;Sumner, Petroc
眼跳干扰效应是研究眼跳竞争的一个常用工具，它是指不相关刺激延迟眼跳到目标刺激的过程。在这里，我们概述了竞争框架的主要组成部分，占时间动态的干扰效果，灵感来自种族模型的扫视一代。We.首先测试这个框架的一个关键预测：干扰的程度应该取决于竞争阶段中目标和干扰物信号的时间重叠程度，这将随着竞争视觉信号的相对处理速度而系统地变化。与此一致，我们发现，当不同的干扰刺激的对比度，目标和干扰之间的呈现延迟，最大限度地提高干扰系统不同的目标-干扰对，与扫视潜伏期的差异对。其次，我们的数据说明了一个关键的方法论观点：当比较不同干扰物的效果时，只在一个时间点（例如，G.正如大多数研究所做的那样，不确定性）可能会产生误导和矛盾的结果。因此，必须考虑系统的时间动态。最后，该框架预测，延迟分心效果的最佳延迟不同于最大化错误率，我们的数据证实了这一点。
The saccadic distractor effect, in which irrelevant stimuli delay saccades to target stimuli, is a popular tool for investigating saccadic competition. Here, we outline the main components of a competition framework to account for the temporal dynamics of the distractor effect, inspired by race models of saccade generation. We. first test a key prediction of this framework: the degree of interference should depend upon the degree of temporal overlap of target and distractor signals in the competition stage, which will vary systematically with the relative processing speeds of the competing visual signals. In agreement with this, we found that, when varying the contrast of distractor stimuli, the presentation delay between target and distractor that maximizes interference varies systematically for different target-distractor pairs, correlated with the difference in saccadic latency for the pair. Second, our data illustrate a crucial methodological point: when comparing the effect of different distractors, measuring at only one time-point ( e. g. simultaneity, as most studies have done) can produce misleading and contradictory results. Thus, it is essential to take the temporal dynamics of the system into account. Lastly, the framework predicts that the optimal delay for the latency distractor effect is different from that maximizing error rate, and our data confirms this.