Children's mappings of large number words to numerosities

被引:49
作者
Barth, Hilary [1 ]
Starr, Ariel [1 ]
Sullivan, Jessica [1 ]
机构
[1] Wesleyan Univ, Dept Psychol, Middletown, CT 06459 USA
关键词
Number; Numerical cognition; Counting; NUMERICAL ESTIMATION; DISCRIMINATION; FOUNDATIONS; COGNITION; LANGUAGE; SYSTEMS; ADULTS;
D O I
10.1016/j.cogdev.2009.04.001
中图分类号
B844 [发展心理学(人类心理学)];
学科分类号
040202 ;
摘要
Previous studies have suggested that children's learning of the relation between number words and approximate numerosities depends on their verbal counting ability, and that children exhibit no knowledge of mappings between number words and approximate numerical magnitudes for number words outside their productive verbal counting range. In the present study we used a numerical estimation task to explore children's knowledge of these mappings. We classified children as Level I counters (those unable to produce a verbal count list up to 35), Level 2 counters (those who were able to count to 35 but not 60) and Level 3 counters (those who counted to 60 or above) and asked children to estimate the number of items on a card. Although the accuracy of children's estimates depended on counting ability, children at all counting skill levels produced estimates that increased linearly in proportion to the target number, for numerosities both within and beyond their counting range. This result was obtained at the group level (Experiment 1) and at the level of individual children (Experiment 2). These findings provide evidence that even the least skilled counters do exhibit some knowledge of the form of the mapping between large number words and approximate numerosities. (C) 2009 Elsevier Inc. All rights reserved.
引用
收藏
页码:248 / 264
页数:17
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