Operational momentum effect in children with and without developmental dyscalculia

Frontiers in Psychology

Karin Kucian¹ 

关键词: developmental dyscalculia;    operational momentum;    children;    learning disability;    numerical cognition;    mental number line;    symbolic calculation;    attention;   

DOI  :  10.3389/fpsyg.2013.00847

学科分类：心理学（综合）

来源: Frontiers

【 摘 要 】

In their valuable article, Knops et al. (2013) challenge the existence of the operational momentum effect (OME) in children. The OME is characterized by the tendency to overestimate the result of addition problems and to underestimate the result of subtractions (McCrink et al., 2007). In line with previous findings, they replicated the OME in adults using a non-symbolic approximation task. In contrast, children did not exhibit such an OME. This finding was quite unexpected since current studies claim that the OME is present in childhood, as early as 9 months of age (Pinhas and Fischer, 2008; McCrink and Wynn, 2009). Together with the evaluation of attentional orienting capacity, the authors concluded that an attentional shift along the mental number line (MNL) most probably explains the OME.

【 授权许可】

CC BY