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In this study we test a number of different claims about the nature of stylistic variation at the "single-word" stage by examining the relation between variation in early vocabulary composition, variation in early language use, and variation in the structural and functional propreties of mothers' child-directed speech. Maternal-report and observational data were collected for 26 children at 10, 50, and 100 words, These were then correlated with a variety of different measures of maternal speech at 10 words, The results show substantial variation in the percentage of common nouns and unanalyzed phrases in children's vocabularies, and singficant relations between this variation and the way in which language is used by the child. They also reveal singficant relations between the way in whch mothers use language at 10 words and the way in chich their children use language at 50 words and between certain formal properties of mothers speech at 10 words and the percentage of common nouns and unanalyzed phrases in children's early vocabularies, However, most of these relations desappear when an attempt is made to control for ossible effects of the child on the mother at Time 1. The exception is a singficant negative correlation between mothers tendency to produce speech that illustrates word boundaries and the percentage of unanalyzed phrases at 50 and 100 words. This suggests that mothers whose sprech provides the child with information about where new words begin and end tend to have children with few unanalyzed. phrases in their early vocabularies. 相似文献
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Koen Luwel Lieven Verschaffel Patrick Onghena Erik De Corte 《European Journal of Psychology of Education - EJPE》2001,16(2):233-255
A previous study (Luwel, Verschaffel, Onghena, & De Corte, 2000) revealed that 2nd and 6th graders use at least 3 different kinds of strategies for determining different numerosities of blocks presented in square grids: (a) an addition strategy by means of which (groups of) blocks are counted (and added), (b) a subtraction strategy in which the number of empty squares is subtracted from the total number of blocks in the grid (i.e. the anchor), and (c) an estimation strategy, whereby the number of blocks is determined in a quick but imprecise way. Although 6th as well as 2nd graders used the clever subtraction strategy, the majority of 2nd graders had serious trouble with the correct determination of the anchor, resulting in huge numerosity judgement errors. Since this finding seriously complicated the testing of a number of hypotheses in that study, we replicated the above study but presented the children information about the grid size. This manipulation led to a substantial increase in the proportion of appropriate subtraction strategy users and made it possible to investigate the effect of several subject and task variables on the frequency, accuracy, and adaptiveness with which the different strategies were applied. Results are discussed in terms of the conceptual framework of Lemaire and Siegler (1995) regarding strategic change. 相似文献
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German children's comprehension of word order and case marking in causative sentences 总被引：1，自引：0，他引：1
Two comprehension experiments were conducted to investigate whether German children are able to use the grammatical cues of word order and word endings (case markers) to identify agents and patients in a causative sentence and whether they weigh these two cues differently across development. Two-year-olds correctly understood only sentences with both cues supporting each other—the prototypical form. Five-year-olds were able to use word order by itself but not case markers. Only 7-year-olds behaved like adults by relying on case markers over word order when the two cues conflicted. These findings suggest that prototypical instances of linguistic constructions with redundant grammatical marking play a special role in early acquisition, and only later do children isolate and weigh individual grammatical cues appropriately. 相似文献
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Linear (proportional) functions are undoubtedly one of the most common models for representing and solving both pure and applied problems in elementary mathematics education. But according to several authors, different aspects of the current culture and practice of school mathematics develop in students a tendency to use these linear models also in situations in which they are not applicable. This article reports two closely related studies about this phenomenon in 12–13- and 15–16-year old students working on word problems involving lengths and areas of similar plane figures of different kinds of shapes, as well as about the influence of drawings in breaking this improper use of linearity. Generally speaking, the results provide a convincing demonstration of the predominance of the linear model in secondary students' solutions of this kind of mensurational problem. 相似文献
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Vanluydt Elien Degrande Tine Verschaffel Lieven Van Dooren Wim 《European Journal of Psychology of Education - EJPE》2020,35(3):529-547
European Journal of Psychology of Education - The present study cross-sectionally investigated proportional reasoning abilities in 5- to 9-year-old children (n = 185) before they... 相似文献
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This contribution reports about a seven-month long video-based study in two regular Flemish sixth-grade mathematics classrooms. The focus is on teachers' approaches towards problem solving. In our analysis we distinguished between a paradigmatic-oriented (focus on the mathematical structure) and a narrative-oriented (focus on the contextual aspects of a problem) perspective on the problem-solving process. The findings have highlighted that the word problem-solving lessons were more dominated by a paradigmatic than a narrative approach and that interventions in which the relation between the mathematics structure and the realistic constraints of the problem context is addressed, were rare. 相似文献
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This research explored the stimulation of mathematics understanding and learning in an Interactive Whiteboard (IWB) environment. IWB affordances appear to be best used when mathematical tasks engage students in mathematical reasoning and when all students are involved in the discussion. The intent of this project was to design and implement, together with a small group of teachers, a series of lessons for the purpose of developing a useful framework for effective IWB use. In a first phase, the potential of the IWB in pursuing high-level mathematical tasks and promoting classroom interactivity was discussed in depth by the teachers and the researchers. Lessons were also planned in detail. In a second phase, the planned lessons were taught in the presence of the researchers, audiotaped and subsequently analysed by the researchers and teachers. The analyses highlighted the usefulness of the IWB in (a) improving high-level mathematical tasks and (b) creating a dialogic interactive discourse for better mathematical understanding and learning. Two main patterns in productive IWB use emerged from the study. The first pattern was that the IWB promoted problem-solving activities through intensive use of geometrical or other mathematical software. The second pattern was using the IWB as a notepad with links to external sources, geometrical and other mathematical constructions, problems and activities, which the teacher, in collaboration with the students, ‘tailors’ following a thread. For both patterns, developing a strong synergy between the IWB affordances and students’ interaction with it seemed critical. The IWB appears to be a powerful tool that allows students and teachers to alternate between different points of view and different visualisations of the same topic. 相似文献
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问题提出和问题解决之间关系的问卷调查 总被引：1，自引：2，他引：1
“ 问题提出” 近些年来引起了许多学者的重视,这些学者一致认为“ 问题提出” 是数学课程的重要组成部分,甚至是数学教学活动的中心.“ 问题提出” 在课程与教学上的最大作用是它能够促使学生成为更好的问题解决者.“ 问题提出”和“ 问题解决” 相互促进,同时,“ 问题解决” 能力的高低也影响“ 问题提出” 的水平.调查表明,中国四年级学生的问题提出能力和问题解决能力之间存在很大的关系. 相似文献
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Bahar Köymen Elena Lieven Denis A. Engemann Hannes Rakoczy Felix Warneken Michael Tomasello 《Child development》2014,85(3):1108-1122
This study investigates how children negotiate social norms with peers. In Study 1, 48 pairs of 3‐ and 5‐year‐olds (N = 96) and in Study 2, 48 pairs of 5‐ and 7‐year‐olds (N = 96) were presented with sorting tasks with conflicting instructions (one child by color, the other by shape) or identical instructions. Three‐year‐olds differed from older children: They were less selective for the contexts in which they enforced norms, and they (as well as the older children to a lesser extent) used grammatical constructions objectifying the norms (“It works like this” rather than “You must do it like this”). These results suggested that children's understanding of social norms becomes more flexible during the preschool years. 相似文献