Detecting novelty and significance.

Detecting novelty and significance.
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DOI:
10.1162/jocn.2009.21244
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发表时间:
2010-02
影响因子:
3.2
通讯作者:
Lang PJ
Lang PJ
中科院分区:
医学3区
文献类型:
--
作者:
Ferrari V;Bradley MM;Codispoti M;Lang PJ

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认知研究通常采用“古怪”范式来研究刺激的新奇性和重要性对信息加工的影响。然而,一个古怪的人往往比标准的、重复的刺激在感知上更新颖,并且与正在进行的任务更相关,这使得由于感知的新奇和刺激的重要性而难以理清效果。在目前的研究中,感知的新奇和意义的ERP的影响进行了评估,在一个被动的观看环境中,通过呈现重复和新颖的图片(自然场景),无论是信号的重要信息,关于当前的上下文或没有。额-中央N2成分主要受知觉新奇性的影响,而中央-顶叶P3成分受刺激重要性和新奇性的调制。这些数据支持的解释,N2反映知觉流畅性和衰减时,当前的刺激匹配的主动记忆表示和P3的幅度反映刺激的意义和重要性。
Studies of cognition often use an “oddball” paradigm to study effects of stimulus novelty and significance on information processing. However, an oddball tends to be perceptually more novel than the standard, repeated stimulus as well as more relevant to the ongoing task, making it difficult to disentangle effects due to perceptual novelty and stimulus significance. In the current study, effects of perceptual novelty and significance on ERPs were assessed in a passive viewing context by presenting repeated and novel pictures (natural scenes) that either signaled significant information regarding the current context or not. A fronto-central N2 component was primarily affected by perceptual novelty, whereas a centro-parietal P3 component was modulated by both stimulus significance and novelty. The data support an interpretation that the N2 reflects perceptual fluency and is attenuated when a current stimulus matches an active memory representation and that the amplitude of the P3 reflects stimulus meaning and significance.
自然的选择性关注:定向和情感。
DOI: 10.1111/j.1469-8986.2008.00702.x
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