Faulkenberry Thomas J, Cruise Alexander, Shaki Samuel
1 Department of Psychological Sciences, Tarleton State University, Stephenville, TX, USA.
2 Department of Behavioral Sciences, Ariel University, Ariel, Israel.
Exp Psychol. 2017 May;64(3):191-204. doi: 10.1027/1618-3169/a000365.
Though recent work in numerical cognition has supported a strong tie between numerical and spatial representations (e.g., a mental number line), less is known about such ties in multi-digit number representations. Along this line, Bloechle, Huber, and Moeller (2015) found that pointing positions in two-digit number comparison were biased leftward toward the decade digit. Moreover, this bias was reduced in unit-decade incompatible pairs. In the present study, we tracked computer mouse movements as participants compared two-digit numbers to a fixed standard (55). Similar to Bloechle et al. (2015) , we found that trajectories exhibited a leftward bias that was reduced for unit-decade incompatible comparisons. However, when positions of response labels were reversed, the biases reversed. That is, we found a rightward bias for compatible pairs that was reduced for incompatible pairs. This result calls into question a purely embodied representation of place value structure and instead supports a competition model of two-digit number representation.
尽管近期在数字认知方面的研究支持了数字与空间表征之间存在紧密联系（例如，心理数字线），但对于多位数表征中的此类联系却知之甚少。沿着这一思路，布洛赫勒、胡贝尔和默勒（2015年）发现，在两位数比较中，指向位置向左偏向十位数。此外，在个位与十位不匹配的数字对中，这种偏向会减弱。在本研究中，当参与者将两位数与固定标准（55）进行比较时，我们追踪了他们的电脑鼠标移动轨迹。与布洛赫勒等人（2015年）的研究相似，我们发现轨迹呈现出向左的偏向，在个位与十位不匹配的比较中这种偏向会减弱。然而，当反应标签的位置颠倒时，偏向也会颠倒。也就是说，我们发现对于匹配数字对存在向右的偏向，而在不匹配数字对中这种偏向会减弱。这一结果对位置值结构的纯粹具身表征提出了质疑，转而支持了两位数表征的竞争模型。
