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首页> 外文期刊>Cortex: A Journal Devoted to the Study of the Nervous System and Behavior >On the impact of different number representations in the number bisection task.
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On the impact of different number representations in the number bisection task.

机译:在数字二等分任务中影响不同的数字表示形式。

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摘要

The number bisection task--in which the numerical middle of two other numbers has to be determined (e.g., 6 is the numerical middle of 4 and 8)--has recently been used in neuropsychological case studies in addition to the number comparison task to assess quantitative capabilities in number processing. While factors determining difficulty in normal participants have often been systematically investigated in the number comparison task, this has not yet been done in the number bisection task. Based on a pilot study by van Herten (1999), we extracted four factors that we hypothesized to modulate difficulty in a verification version of the number bisection task in normal participants: Multiplicativity (whether or not the three numbers are part of a multiplication table), range (distance between the smallest and the largest number) for bisectable number triplets as well as distance of the middle number to the numerical middle, and bisection possibility for non-bisectable triplets. In the current study, we obtained large effects for all four factors on RT and accuracy data and some interesting interactions in normal participants. In a regression analysis, we additionally observed inhibitory effects of decade crossing and of ten inclusion (whether or not one of the three numbers was a decade number). We discuss the impact of these results for the use of the number bisection task as an assessment tool in neuropsychology. Finally, we examine the consequences of these results for models of number processing.
机译:数字二等分任务(其中必须确定其他两个数字的中间数字(例如,6是4和8的数字中间数字))除了用于进行数字比较任务外,最近还被用于神经心理学案例研究中。评估数字处理中的定量能力。尽管经常在数字比较任务中系统地研究了确定正常参与者困难的因素,但在数字二等分任务中尚未做到这一点。根据van Herten(1999)进行的一项初步研究,我们提取了四个假设的因素,这些因素被认为可以调节正常参与者的数字二等分任务验证版本中的难度:可乘性(这三个数字是否是乘法表的一部分) ,可二等分三元组的范围(最小数与最大数之间的距离),中间数与数值中位数的距离以及不可二等分三元组的二等分可能性。在当前的研究中,我们获得了所有四个因素对RT和准确性数据的巨大影响,以及正常参与者中的一些有趣的相互作用。在回归分析中,我们还观察到十进制交叉和十个包含的抑制作用(三个数字之一是否为十进制数字)。我们讨论了使用数字二等分任务作为神经心理学评估工具时这些结果的影响。最后,我们检查了这些结果对数字处理模型的影响。

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