Gevers Wim, Ratinckx Elie, De Baene Wouter, Fias Wim
Department of Experimental Psychology, Ghent University, Belgium.
Exp Psychol. 2006;53(1):58-68. doi: 10.1027/1618-3169.53.1.58.
In a binary response setting, it has been frequently observed that small numbers are reacted to faster with the left hand and large numbers with the right hand (i. e., the SNARC-effect) which reflects the spatial left-right orientation of the mental number line (Dehaene, Bossini, & Giraux, 1993). In line with the work of Keus and Schwarz (in press), we investigated the locus of the conflict in the SNARC effect in a parity judgment task with the Arabic numerals 1, 2, 8, or 9. Differences between compatible (left-hand response to 1 or 2 and right-hand response to 8 and 9) and incompatible SNARC conditions (left-hand response to 8 or 9 and right-hand response to 1 or 2) were observed in the lateralized readiness potential (LRP) but not in the peak latency of the P300. In accordance with Keus and colleagues (Keus, Jenks, & Schwarz, 2005), we argue that the locus of the conflict is situated at intermediate response-related stages. However, instead of adopting a single-route processing architecture, a dual route account is proposed as the underlying processing architecture explaining the SNARC effect.
在二元反应情境中，人们经常观察到，较小的数字用左手反应更快，而较大的数字用右手反应更快（即SNARC效应），这反映了心理数字线的空间左右方向（德阿纳、博西尼和吉罗，1993）。与库斯和施瓦茨（即将发表）的研究一致，我们在使用阿拉伯数字1、2、8或9的奇偶判断任务中，研究了SNARC效应中冲突的位置。在侧化准备电位（LRP）中观察到了兼容（对1或2用左手反应，对8和9用右手反应）和不兼容SNARC条件（对8或9用左手反应，对1或2用右手反应）之间的差异，但在P300的峰值潜伏期没有观察到差异。与库斯及其同事（库斯、詹克斯和施瓦茨，2005）一致，我们认为冲突的位置位于与反应相关的中间阶段。然而，我们提出了一种双路径解释，而不是采用单路径处理架构，作为解释SNARC效应的潜在处理架构。
