Núñez-Peña M Isabel, Suárez-Pellicioni Macarena
Department of Behavioral Sciences Methods, Faculty of Psychology, University of Barcelona, Spain; Institute for Brain, Cognition, and Behavior (IR3C), University of Barcelona, Spain.
Department of Behavioral Sciences Methods, Faculty of Psychology, University of Barcelona, Spain; Institute for Brain, Cognition, and Behavior (IR3C), University of Barcelona, Spain.
Biol Psychol. 2014 Dec;103:176-83. doi: 10.1016/j.biopsycho.2014.09.004. Epub 2014 Sep 16.
Numerical comparison tasks are widely used to study the mental representation of numerical magnitude. In study, event-related brain potentials (ERPs) were recorded while 26 high math-anxious (HMA) and 27 low math-anxious (LMA) individuals were presented with pairs of single-digit Arabic numbers and were asked to decide which one had the larger numerical magnitude. The size of the numbers and the distance between them were manipulated in order to study the size and the distance effects. The results showed that both distance and size effects were larger for the HMA group. As for ERPs, results showed that the ERP distance effect had larger amplitude for both the size and distance effects in the HMA group than among their LMA counterparts. Since this component has been taken as a marker of the processing of numerical magnitude, this result suggests that HMA individuals have a less precise representation of numerical magnitude.
数字比较任务被广泛用于研究数字大小的心理表征。在一项研究中，记录了26名高数学焦虑（HMA）个体和27名低数学焦虑（LMA）个体的事件相关脑电位（ERP），同时向他们呈现一对一位阿拉伯数字，并要求他们判断哪个数字的数值更大。通过操纵数字的大小以及它们之间的距离来研究大小效应和距离效应。结果表明，HMA组的距离效应和大小效应都更大。至于ERP，结果显示，HMA组中ERP距离效应在大小效应和距离效应方面的波幅都比LMA组的对应个体更大。由于该成分已被视为数字大小加工的一个标志，这一结果表明HMA个体对数字大小的表征不太精确。
