从教师对直方图的解读看教师对变异性的概念和专业知识&以委内瑞拉在职中学数学教师为例

Q3 Social Sciences Statistics Education Research Journal Pub Date : 2021-12-25 DOI:10.52041/serj.v20i2.412
O. González
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引用次数: 0

摘要

许多研究报告了教师的变异性概念对其教学统计专业知识及其课堂实践各个方面的影响。然而,对这些类型概念的研究仍然很少,特别是在委内瑞拉等拉丁美洲国家。为了帮助填补这一差距,进行了一项定性研究,旨在描述委内瑞拉在职中学数学教师对变异性概念化的不同方式。为此,为在加拉加斯大都会地区工作的27名教师开发并管理了一项调查工具。这篇论文的重点是参与者对需要解释直方图的两个项目的回答。发现约有三分之一的参与者对变异性表现出复杂的认识(例如,给出了连接中间和极端的答案),而其中约有一半的参与者对变异性表现出误解,例如从特质观念的角度承认变异性,或直方图的对称度(或缺乏对称度)。此外,还发现约三分之二的参与者无法正确地将真实的生活背景与其相应的直方图匹配,而约五分之二的参与者无法正确确定直方图中对变异性描述的准确性或不准确性。作者讨论了获得结果的可能原因,以确定统计领域教师教育的相关含义。摘要:西班牙的研究表明,教师对可变性的概念既影响了他们在统计教学中的专业知识,也影响了他们在课堂上的实践。然而,对这类概念的研究仍然很少,特别是在委内瑞拉等拉丁美洲国家。为了满足这一需要,进行了一项定性研究,以确定和描述委内瑞拉中学数学教师对可变性概念化的不同方式。为此,对加拉加斯大都市区的27名教师进行了问卷调查。这篇文章的重点是参与者对问卷中两个项目的答复,其中需要解释直方图。研究发现,大约五分之一的参与者表现出对可变性的复杂识别(例如,同时考虑直方图的中心值和极端值),而一半的参与者已经表现出错误的概念,例如根据特殊想法识别可变性,或直方图的对称程度。此外,约五分之四的参与者无法在现实生活背景与其各自的直方图之间建立对应关系,而约五分之二的参与者无法确定直方图中对可变性的描述是否正确。作者讨论了取得结果的可能原因,以确定与统计领域教师培训有关的含义。
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TEACHERS’ CONCEPTIONS AND PROFESSIONAL KNOWLEDGE OF VARIABILITY FROM THEIR INTERPRETATION OF HISTOGRAMS: THE CASE OF VENEZUELAN IN-SERVICE SECONDARY MATHEMATICS TEACHERS
Many studies have reported on the influence of teachers’ conceptions of variability on different aspects of their professional knowledge for teaching statistics and their classroom practices. However, research on these kind of conceptions is still scarce, particularly in Latin American countries like Venezuela. In an effort to help fill this gap, a qualitative study was conducted that aimed to characterize the different ways in which Venezuelan in-service secondary school mathematics teachers conceptualize variability. For that purpose, a survey instrument was developed and administered to 27 teachers working at the metropolitan area of Caracas. This paper focuses on the participants’ answers to two items in which interpretation of histograms was necessary. It was found that about a third of the participants exhibited a sophisticated recognition of variability (e.g., gave answers connecting both middles and extremes), whereas about half of them exhibited misconceptions of variability, such as acknowledging variability from the viewpoint of idiosyncratic ideas, or the degree of symmetry (or lack thereof) of a histogram. Moreover, it was also found that about two-thirds of the participants were unable to correctly match real-life contexts to their corresponding histograms, while about two-fifths were unable to correctly determine the accuracy or inaccuracy of descriptions of the variability in a histogram. The author discusses possible reasons for the obtained results, in order to identify relevant implictions for teacher education in the area of statistics. Abstract: Spanish Diversos estudios han reportado que las concepciones de los docentes sobre variabilidad influencian tanto su conocimiento profesional para la enseñanza de la estadística, como sus prácticas en el aula. Sin embargo, investigaciones sobre este tipo de concepciones son aún escasas, particularmente en países latinoamericanos como Venezuela. Intentando satisfacer esta necesidad, se condujo un estudio cualitativo para identificar y caracterizar las diferentes maneras en que maestros venezolanos de matemáticas a nivel de secundaria conceptualizan la variabilidad. Con tal propósito, un cuestionario fue desarrollado y administrado a 27 docentes en el área metropolitana de Caracas. Este artículo se centra en las respuestas dadas por los participantes a dos ítems del cuestionario, en los que era necesaria la interpretación de histogramas. Se descubrió que aproximadamente un quinto de los participantes demostró un reconocimiento sofisticado de la variabilidad (e.g., considerar simultáneamente valores centrales y extremos de un histograma), mientras que alreadedor de la mitad exhibió concepciones erróneas, tales como el reconocimiento de la variabilidad a partir de ideas idiosincrásicas, o del grado de simetría de un histograma. Además, unos cuatro quintos de los participantes fueron incapaces de establecer una correspondencia entre contextos de la vida real y sus respectivos histogramas, mientras que unos dos quintos fueron incapaces de determinar si descripciones de la variabilidad en un histograma eran o no correctas. El autor discute las posibles razones de los resultados obtenidos, con el fin de identificar implicaciones relevantes para la formación docente en el área de la estadística.
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来源期刊
Statistics Education Research Journal
Statistics Education Research Journal Social Sciences-Education
CiteScore
1.30
自引率
0.00%
发文量
46
期刊介绍: SERJ is a peer-reviewed electronic journal of the International Association for Statistical Education (IASE) and the International Statistical Institute (ISI). SERJ is published twice a year and is free. SERJ aims to advance research-based knowledge that can help to improve the teaching, learning, and understanding of statistics or probability at all educational levels and in both formal (classroom-based) and informal (out-of-classroom) contexts. Such research may examine, for example, cognitive, motivational, attitudinal, curricular, teaching-related, technology-related, organizational, or societal factors and processes that are related to the development and understanding of stochastic knowledge. In addition, research may focus on how people use or apply statistical and probabilistic information and ideas, broadly viewed. The Journal encourages the submission of quality papers related to the above goals, such as reports of original research (both quantitative and qualitative), integrative and critical reviews of research literature, analyses of research-based theoretical and methodological models, and other types of papers described in full in the Guidelines for Authors. All papers are reviewed internally by an Associate Editor or Editor, and are blind-reviewed by at least two external referees. Contributions in English are recommended. Contributions in French and Spanish will also be considered. A submitted paper must not have been published before or be under consideration for publication elsewhere.
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