The Spatial-Numerical Association of Response Codes (SNARC) effect was examined in highly (HMA) and low math-anxious (LMA) individuals performing a number comparison in an ERP study. The SNARC effect consists of faster latencies when the response side is congruent with number location in the mental number line (MNL). Despite the stronger SNARC effect in the HMA group, their responses in incongruent trials were slower than in congruent trials only for the largest numerical magnitudes. Moreover, HMAs showed a less positive centroparietal P3b component in incongruent trials than in congruent ones, but only for the largest magnitudes. Since the SNARC effect arises during response selection and P3b positivity decreases with the difficulty of decision, this result suggests that HMA individuals might find it more difficult than LMAs to control the conflict between the automatically activated location of numbers in the MNL and the response side, especially in more cognitively demanding trials.

在ERP研究中进行数字比较的高（HMA）和低数学焦虑（LMA）个体中检查了响应数字的空间数字关联（SNARC）效果。当响应方与心理数字线（MNL）中的数字位置一致时，SNARC效果包括更快的延迟。尽管HMA组对SNARC的作用更强，但仅在最大数量级时，它们在不一致试验中的反应要慢于一致试验中的反应。此外，HMA在不一致的试验中显示出的向心性P3b成分的阳性率低于一致试验中的，但仅在最大程度时才如此。由于在响应选择期间会出现SNARC效应，并且P3b阳性随决策难度而降低，