Didino Daniele, Breil Christina, Knops André
Department of Psychology, Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany.
Department of Psychology III, University of Würzburg, Würzburg, Germany.
Acta Psychol (Amst). 2019 May;196:75-86. doi: 10.1016/j.actpsy.2019.04.008. Epub 2019 Apr 17.
The Spatial-Numerical Association of Response Code (SNARC) effect refers to the finding that small or large numbers elicit faster leftward or rightward responses, respectively. Traditionally, this effect has been thought to reflect the intrinsic spatial orientation of the mental number line (MNL account) and thus to be modulated by the amount of semantic processing required by the task. This study aimed to test this hypothesis. Participants performed two tasks requiring semantic processing (magnitude classification and parity judgement) and two tasks requiring the processing of non-semantic features of the number (phoneme detection and color judgement). Contrary to the MNL account, the SNARC effect in the four tasks was not modulated by the amount of semantic processing, but rather by response latency. These results provide evidence against the MNL account and in favor of alternative accounts (dual-route model, working memory account).
反应编码的空间-数字关联（SNARC）效应是指这样一个发现：小数字或大数字分别引发更快的向左或向右反应。传统上，这种效应被认为反映了心理数字线的内在空间方向（心理数字线理论），因此会受到任务所需语义处理量的调节。本研究旨在检验这一假设。参与者执行了两项需要语义处理的任务（大小分类和平偶判断）以及两项需要处理数字非语义特征的任务（音素检测和颜色判断）。与心理数字线理论相反，这四项任务中的SNARC效应并非由语义处理量调节，而是由反应潜伏期调节。这些结果为反对心理数字线理论并支持其他理论（双路径模型、工作记忆理论）提供了证据。
