Competition in saccade target selection reveals attentional guidance by simultaneously active working memory representations.
Competition in saccade target selection reveals attentional guidance by simultaneously active working memory representations.
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DOI：
10.1037/xhp0000306
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发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
Hollingworth A
中科院分区：
文献类型：
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作者：
Beck VM;Hollingworth A
视觉工作记忆(VWM)的内容引导着人们的注意，但这种相互作用是局限于单一的VWM表征，还是针对多个VWM表征的功能性，目前还存在争议。为了测试这个问题，我们开发了一个视线相关的搜索范式来直接操纵选择历史，并检查多个线索匹配的扫视目标对象之间的竞争。参与者首先看到了一个双色提示，然后是两对顺序呈现的彩色物体。对于每一对，参与者有选择地盯着一个与提示颜色之一匹配的物体。关键的是，对于第二组，第一组的线索颜色要么是新的干扰色，要么是第二组线索颜色。在后一种情况下，如果VWM中的两种提示色同时与选择相互作用，我们预计第二个提示色对象会产生激烈的选择竞争，即使第一个提示色被用来引导紧挨着前一对的注意。实际上，在第二对中，在存在第二提示颜色的情况下，第一提示颜色的选择概率大大降低。线索匹配对象之间的这种竞争提供了强有力的证据，表明两种VWM表征与选择同时相互作用。
The content of visual working memory (VWM) guides attention, but whether this interaction is limited to a single VWM representation or functional for multiple VWM representations is under debate. To test this issue, we developed a gaze-contingent search paradigm to directly manipulate selection history and examine the competition between multiple cue-matching saccade target objects. Participants first saw a dual-color cue followed by two pairs of colored objects presented sequentially. For each pair, participants selectively fixated an object that matched one of the cued colors. Critically, for the second pair, the cued color from the first pair was presented either with a new distractor color or with the second cued color. In the latter case, if two cued colors in VWM interact with selection simultaneously, we expected the second cued color object to generate substantial competition for selection, even though the first cued color was used to guide attention in the immediately previous pair. Indeed, in the second pair, selection probability of the first cued color was substantially reduced in the presence of the second cued color. This competition between cue-matching objects provides strong evidence that both VWM representations interacted simultaneously with selection.