Children's number-line estimation shows development of measurement skills (not number representations).

Children's number-line estimation shows development of measurement skills (not number representations).
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DOI:
10.1037/a0035901
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发表时间:
2014-06
影响因子:
4
通讯作者:
Sarnecka BW
Sarnecka BW
中科院分区:
心理学2区
文献类型:
--
作者:
Cohen DJ;Sarnecka BW

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儿童对数字的理解通常是使用数字线任务来评估的,在该任务中,向儿童展示一条线,一端标有0,另一端标有更大的数字(例如,100)。然后,询问孩子线路上的某个中间数字(例如,70)应该放在哪里。这项任务的表现在儿童时期发生了可预测的变化,这通常被解释为儿童对整数值的心理表征发生了变化的证据。本文提供了理论和经验证据,证明数字线成绩的变化实际上反映了在任务中使用的测量技能的发展。我们比较了数字行任务的两种版本:文献中使用的有界版本和新的无界版本。结果表明,只有儿童在有界任务(需要减法或除法)上的成绩才会随着年龄的增长而显著变化。相比之下,随着年龄的增长,孩子们在无限任务(只需要加法)上的表现保持相当稳定。因此,在传统的有限制的数字线任务上,成绩的发展变化可能反映了特定任务测量技能的发展,而不是儿童对数字数量理解的变化。
Children’s understanding of numbers is often assessed using a number-line task, where the child is shown a line labeled with 0 at one end and a higher number (e.g., 100) at the other end. The child is then asked where on the line some intermediate number (e.g., 70) should go. Performance on this task changes predictably during childhood, and this has often been interpreted as evidence of a change in the child’s psychological representation of integer quantities. The present article presents theoretical and empirical evidence that the change in number-line performance actually reflects the development of measurement skills used in the task. We compare 2 versions of the number-line task: the bounded version used in the literature and a new, unbounded version. Results indicate that it is only children’s performance on the bounded task (which requires subtraction or division) that changes markedly with age. In contrast, children’s performance on the unbounded task (which requires only addition) remains fairly constant as they get older. Thus, developmental changes in performance on the traditional bounded number-line task likely reflect the growth of task-specific measurement skills rather than changes in the child’s understanding of numerical quantities.
DOI: 10.3758/bf03199483
发表时间: 1977-01-01
期刊: PERCEPTION & PSYCHOPHYSICS
影响因子: --
作者:
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