FN400 potentials are functionally identical to N400 potentials and reflect semantic processing during recognition testing.

FN400 potentials are functionally identical to N400 potentials and reflect semantic processing during recognition testing.
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DOI:
10.1111/j.1469-8986.2010.01085.x
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发表时间:
2011-04
期刊:
影响因子:
3.7
通讯作者:
Federmeier KD
Federmeier KD
中科院分区:
心理学3区
文献类型:
--
作者:
Voss JL;Federmeier KD

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FN400 中的“F”表示相对于形态上相似的 N400 成分而言,更靠近额叶的头皮分布,这一区别与假设的 FN400 在熟悉记忆中与 N400 在语言中的不同作用一致。然而,没有直接比较证实这些假设的差异。为此,我们在识别测试期间操纵了短期语义启动。在相同潜伏期,N400 上的语义启动效应与记忆效应无法区分,并且语义启动强烈调节“FN400”,尽管对熟悉记忆没有影响。因此,没有证据表明 N400 和 FN400 之间存在电生理或功能差异,并且研究结果与“FN400”与熟悉度的联系相反。相反,语义/概念启动(反映在 N400 中)似乎发生在识别测试期间,并且经常被(错误)标记为 FN400 并归因于熟悉。
The “F” in FN400 denotes a more frontal scalp distribution relative to the morphologically similar N400 component—a distinction consistent with the hypothesized distinct roles of FN400 in familiarity memory versus N400 in language. However, no direct comparisons have substantiated these assumed dissimilarities. To this end, we manipulated short-term semantic priming during a recognition test. Semantic priming effects on N400 were indistinguishable from memory effects at the same latency, and semantic priming strongly modulated the “FN400,” despite having no influence on familiarity memory. Thus, no evidence suggested either electrophysiological or functional differences between the N400 and FN400, and findings were contrary to the linking of the “FN400” to familiarity. Instead, it appears that semantic/conceptual priming (reflected in the N400) occurs during recognition tests, and is frequently (mis)labeled as FN400 and attributed to familiarity.
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