The Neural Mechanism Underlying Ordinal Numerosity Processing
The Neural Mechanism Underlying Ordinal Numerosity Processing
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DOI：
10.1162/jocn_a_00541
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发表时间：
2014-05-01
影响因子：
3.2
通讯作者：
Reynvoet, Bert
中科院分区：
文献类型：
--
作者：
Gebuis, Titia;Reynvoet, Bert
数字刺激的感官特性的变化对非符号数字任务的结果有直接影响。这表明感官特性在数字处理中发挥着重要作用。然而，目前的共识认为，数量的处理与其感官特性无关。为了研究感官线索在序数过程中的作用，我们正交地操纵两个维度。参与者被动地观察刺激，同时使用脑电图测量他们的大脑活动。结果揭示了在没有主效应的情况下数量与其感官特性之间的相互作用。与数量和感觉线索朝相反方向变化的试验相比，数量和感觉线索朝相同方向变化的试验存在不同的神经反应。这些结果表明，感官线索预计会随着数字而变化，并支持在判断数字时考虑视觉线索的观点。
Changes in the sensory properties of numerosity stimuli have a direct effect on the outcomes of nonsymbolic number tasks. This suggests a prominent role of sensory properties in numerosity processing. However, the current consensus holds that numerosity is processed independent of its sensory properties. To investigate the role of sensory cues in ordinal number processes, we manipulated both dimensions orthogonally. Participants passively viewed the stimuli while their brain activity was measured using EEG. The results revealed an interaction between numerosity and its sensory properties in the absence of main effects. Different neural responses were present for trials where numerosity and sensory cues changed in the same direction compared with trials where they changed in opposite directions. These results show that the sensory cues are expected to change in concert with numerosity and support the notion that the visual cues are taken into account when judging numerosity.