Tabullo Angel, Yorio Alberto, Zanutto Silvano, Wainselboim Alejandro
Instituto de Medicina y Biología Experimental, Conicet, Vuelta de Obligado 2490 (C1428ADN), Buenos Aires, Argentina.
Instituto de Medicina y Biología Experimental, Conicet, Vuelta de Obligado 2490 (C1428ADN), Buenos Aires, Argentina.
Int J Psychophysiol. 2015 May;96(2):74-83. doi: 10.1016/j.ijpsycho.2015.03.004. Epub 2015 Mar 17.
Semantic priming has been widely observed at both behavioral and electrophysiological levels as reductions in response times and N400 magnitudes respectively. However, the possibility that stimulus relations derived from associative learning elicit N400 priming effects comparable to those found in language has not been properly addressed yet. Equivalence relations emerge after establishing a set of arbitrary and intra-experimentally defined relations through associative learning, thus allowing the study of derived stimulus relations in the absence of semantic content. The present study aimed to compare ERP correlates of priming in semantically related words and pseudowords related through equivalence. We found similar behavioral and N400 effects when comparing unrelated vs related prime-target pairs in language and stimulus equivalence tasks, suggesting that priming engages at least partially overlapping neural mechanisms in both contexts. In addition, we found a posteriorly distributed late positivity in the semantic priming task only, which may be reflecting language-specific processing.
语义启动效应在行为和电生理水平上均有广泛观察，分别表现为反应时间缩短和N400波幅降低。然而，源自联想学习的刺激关系引发与语言中发现的类似N400启动效应的可能性尚未得到充分探讨。通过联想学习建立一组任意且在实验内定义的关系后，等价关系便会出现，从而能够在没有语义内容的情况下研究派生刺激关系。本研究旨在比较语义相关词和通过等价关系相关的伪词启动效应的ERP相关性。在语言和刺激等价任务中，比较无关与相关的启动-目标对时，我们发现了相似的行为和N400效应，这表明在两种情况下启动效应至少部分涉及重叠的神经机制。此外，我们仅在语义启动任务中发现了后部分布的晚期正波，这可能反映了特定于语言的加工过程。
