Learned spatial suppression is not always proactive.
Learned spatial suppression is not always proactive.
复制标题
习得的空间抑制并不总是主动的。
DOI：
10.1037/xhp0001133
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Leber, Andrew B.
中科院分区：
文献类型：
--
作者：
Chang, Seah;Dube, Blaire;Golomb, Julie D.;Leber, Andrew B.
学会忽略干扰对于导航视觉世界至关重要。研究表明，经常包含显著干扰物的位置可以被抑制。这种压制是如何起作用的？以前的研究提供了证据，主动抑制，但方法的局限性排除了坚定的结论。我们试图克服这些限制与一个新的搜索探测范式。在搜索试验中，参与者搜索一个形状古怪的目标，而一个显着的颜色单分散经常出现在一个高概率的位置。在随机交错的探测试验中，参与者区分了在其中一个搜索位置短暂出现的倾斜条的方向，使我们能够在搜索开始的那一刻索引注意力的空间分布。搜索试验的结果重复了以前的研究结果：减少注意力捕获时，一个突出的干扰出现在高概率的位置。然而，关键的是，在高概率和低概率位置，探针辨别力没有什么不同。在实验2中，我们增加了忽略高概率位置的激励，并发现，惊人的是，探针识别准确性在高概率位置更高。这些结果表明，高概率的位置被抑制之前，最初选择，符合反应机制。总的来说，准确性探测程序表明，学习空间抑制并不总是积极主动的，即使响应时间指标似乎与这样的推断一致。
Learning to ignore distractors is critical for navigating the visual world. Research has suggested that a location frequently containing a salient distractor can be suppressed. How does such suppression work? Previous studies provided evidence for proactive suppression, but methodological limitations preclude firm conclusions. We sought to overcome these limitations with a new search-probe paradigm. On search trials, participants searched for a shape oddball target while a salient color singleton distractor frequently appeared in a high-probability location. On randomly interleaved probe trials, participants discriminated the orientation of a tilted bar presented briefly at one of the search locations, allowing us to index the spatial distribution of attention at the moment the search would have begun. Results on search trials replicated previous findings: reduced attentional capture when a salient distractor appeared in the high-probability location. However, critically, probe discrimination was no different at the high-probability and low-probability locations. We increased the incentive to ignore the high-probability location in Experiment 2 and found, strikingly, that probe discrimination accuracy was greater at the high-probability location. These results suggest that the high-probability location was initially selected before being suppressed, consistent with a reactive mechanism. Overall, the accuracy probe procedure demonstrates that learned spatial suppression is not always proactive, even when response time metrics seem consistent with such an inference.