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《学习科学杂志》2013,22(1):49-94
To reap the benefits of natural language interaction, tutorial systems must be endowed with the properties that make human natural-language interaction so effective. One striking feature of naturally occurring interactions is that human tutors and students freely refer to the context created by prior explanations. In contrast, computer-generated utterances that do not draw on the previous discourse often seem awkward and unnatural and may even be incoherent. The explanations produced by such systems are frustrating to students because they repeat the same information over and over again. Perhaps more critical is that, by not referring to prior explanations, computer-based tutors are not pointing out similarities between problem-solving situations and therefore may be missing out on opportunities to help students form generalizations. In this article, we discuss several observations from an analysis of human-human tutorial interactions and provide examples of the ways in which tutors and students refer to previous explanations. We describe how we have used a case-based reasoning algorithm to enable a computational system to identify prior explanations that may be relevant to the explanation currently being generated. We then describe two computational systems that can exploit this knowledge about relevant prior explanations in constructing their subsequent explanations. 相似文献
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This study aimed to explore secondary students’ explanations of evolutionary processes, and to determine how consistent these
were, after a specific evolution instruction. In a previous study it was found that before instruction students provided different
explanations for similar processes to tasks with different content. Hence, it seemed that the structure and the content of
the task may have had an effect on students’ explanations. The tasks given to students demanded evolutionary explanations,
in particular explanations for the origin of homologies and adaptations. Based on the conclusions from the previous study,
we developed a teaching sequence in order to overcome students’ preconceptions, as well as to achieve conceptual change and
explanatory coherence. Students were taught about fundamental biological concepts and the several levels of biological organization,
as well as about the mechanisms of heredity and of the origin of genetic variation. Then, all these concepts were used to
teach about evolution, by relating micro-concepts (e.g. genotypes) to macro-concepts (e.g. phenotypes). Moreover, during instruction
students were brought to a conceptual conflict situation, where their intuitive explanations were challenged as emphasis was
put on two concepts entirely opposed to their preconceptions: chance and unpredictability. From the explanations that students
provided in the post-test it is concluded that conceptual change and explanatory coherence in evolution can be achieved to
a certain degree by lower secondary school students through the suggested teaching sequence and the explanatory framework,
which may form a basis for teaching further about evolution. 相似文献
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In this article, we examine the mental processes and representations that are required of laypersons when learning about science issues from texts. We begin by defining scientific literacy as the ability to understand and critically evaluate scientific content in order to achieve one's goals. We then present 3 challenges of learning from science texts: the intrinsic complexity of science phenomena, the need to coordinate multiple documents of various types, and the rhetorical structure of the texts themselves. Because scientific information focuses on models, theories, explanations, and evidence, we focus on how explanatory and argumentative texts are processed. Then we examine 2 components of executive control in reading—goal-directed guidance and evaluation of content—that readers can acquire and adopt to deal with these challenges. Finally, we discuss 3 implications that these theories and empirical findings have for interventions intended to improve laypersons’ understanding of scientific information. 相似文献
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Jenaro Guisasola Jose M. Almudi Kristina Zuza 《International Journal of Science Education》2013,35(16):2692-2717
This study examined engineering and physical science students' understanding of the electromagnetic induction (EMI) phenomena. It is assumed that significant knowledge of the EMI theory is a basic prerequisite when students have to think about electromagnetic phenomena. To analyse students' conceptions, we have taken into account the fact that individuals build mental representations to help them understand how a physical system works. Individuals use these representations to explain reality, depending on the context and the contents involved. Therefore, we have designed a questionnaire with an emphasis on explanations and an interview, so as to analyse students' reasoning. We found that most of the students failed to distinguish between macroscopic levels described in terms of fields and microscopic levels described in terms of the actions of fields. It is concluded that although the questionnaire and interviews involved a limited range of phenomena, the identified explanations fall into three main categories that can provide information for curriculum development by identifying the strengths and weaknesses of students' conceptions. 相似文献
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A widespread instructional practice in the teaching of argumentative writing is the use of writing samples or models during instructional conversations about what counts as “good argumentative writing.” In this article, we focus on a set of lessons in a high school English language arts classroom in order to gain insight into how a teacher’s use of writing samples contributed not only to what counts as “good argumentative writing” in that classroom, but how her instructional conversations with a group of 11th grade students revealed a shift in her “argumentative epistemologies” for teaching literature-related argumentative writing. We examine simultaneously the impact of instructional conversations on the evolution of the socially constructed definitions of good argumentative writing and the teacher’s shifting argumentative epistemologies by tracing the teacher’s socially constructed definitions of good argumentative writing in the instructional conversations around argumentative writing samples as they evolve and change over time. The findings suggest that the interactional construction of “good argumentative writing” in instructional conversations was influenced by the broader instructional context (e.g., a testing regimen), by the teacher’s argumentative epistemologies for what counts as good writing, and by the conversational interaction of teachers and students in classroom lessons.
相似文献7.
We assessed undergraduates’ representations of the greenhouse effect, based on student-generated concept sketches, before and after a 30-min constructivist lesson. Principal component analysis of features in student sketches revealed seven distinct and coherent explanatory models including a new Molecular Details model. After the lesson, which described the invisible molecular behaviour of gases, this group (n = 164) produced significantly more expert-like representations of the greenhouse effect, and included fewer novice ideas. The key behaviour that greenhouse gases emit radiation in random directions is new to most students and directly counters common explanations involving reflection and ‘trapping’ of radiation in the atmosphere. Thus, learning molecular behaviour of greenhouse gases may help students replace non-expert explanatory models. This Molecular Details model has not been previously identified, and is unlikely to have emerged from human evaluation of student sketches alone. When teaching the greenhouse effect, we propose that interventions explicitly incorporate greenhouse gas behaviour. 相似文献
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In recent years, an emphasis on scientific argumentation in classrooms has brought into focus collaborative consensus-building as an instructional strategy. In these situations, students with differing and competing arguments are asked to work with one another in order to establish a shared perspective. However, the literature suggests that consensus-building can be challenging for students because their interpretations of the argumentative task and context may not enable their productive engagement with counter-arguments and evidence. In this paper, our goal is to explore the ways in which interactions of students support or inhibit their consensus-building. To that end, we examine and describe three cases that represent different ways in which initially dissenting students try to work towards a consensus with their peers. Through these cases, we demonstrate that legitimization of disparate or incorrect ideas can enable students whose arguments rely on incorrect ideas to feel that their ideas were heard and valued by the rest of their group. As such, we suggest that this legitimization is important because it can help students ‘save face’. This enables students to move away from the competitive and persuasive aspects of argumentation towards interactions that align more closely with sensemaking and consensus-building. 相似文献
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Stefannie de Sá Ibraim 《International Journal of Science Education》2016,38(12):1996-2025
Many researchers have highlighted the important role of teachers in creating and managing argumentative, as well as the need for teachers, during their training, to have opportunities to develop knowledge about arguments, enabling them to work from the perspective of argumentation. This study investigates to what extent a context of explicit teaching of argumentation contributed to developing this knowledge. The data sources include video records of explicit teaching of argumentation, collection of materials produced and used by pre-service teachers, and field notes. Analysis of the data indicates that the explicit teaching of argumentation influenced the conceptual learning of pre-service teachers concerning the elements interwoven into argumentative practice, especially evidence and justifications, and the development of pedagogical aspects in the context of argument. Although the pre-service teachers had expressed some teaching knowledge of argumentation in classroom discussion situations, the use of this approach in teaching situations still appears to be challenging for these teachers. The findings of this study highlight contributions to the area of teacher education in argumentation in terms of knowledge that is essential to plan and conduct argumentation-based teaching, and also to the structure of the initial teacher training programmes directed at teaching in argumentation. 相似文献
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Introducing Pre-university Students to Primary Scientific Literature Through Argumentation Analysis 总被引：1，自引：1，他引：0
Marcel Koeneman Martin Goedhart Miriam Ossevoort 《Research in Science Education》2013,43(5):2009-2034
Primary scientific literature is one of the most important means of communication in science, written for peers in the scientific community. Primary literature provides an authentic context for showing students how scientists support their claims. Several teaching strategies have been proposed using (adapted) scientific publications, some for secondary education, but none of these strategies focused specifically on scientific argumentation. The purpose of this study is to evaluate a strategy for teaching pre-university students to read unadapted primary scientific literature, translated into students’ native language, based on a new argumentation analysis framework. This framework encompasses seven types of argumentative elements: motive, objective, main conclusion, implication, support, counterargument and refutation. During the intervention, students studied two research articles. We monitored students’ reading comprehension and their opinion on the articles and activities. After the intervention, we measured students’ ability to identify the argumentative elements in a third unadapted and translated research article. The presented framework enabled students to analyse the article by identifying the motive, objective, main conclusion and implication and part of the supports. Students stated that they found these activities useful. Most students understood the text on paragraph level and were able to read the article with some help for its vocabulary. We suggest that primary scientific literature has the potential to show students important aspects of the scientific process and to learn scientific vocabulary in an authentic context. 相似文献
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《International Journal of Educational Research》2003,39(1-2):113-131
In this article two studies on the use of diagrams in computer-supported collaborative learning are compared. Focus is on the way argumentative diagrams can be used during collaborative learning tasks, more specifically how diagrams support argumentative interaction between students when they discuss ill-defined topics. The main goal is to discover how diagram construction before discussion, and diagram construction during discussion, influence the way students explore the space of debate during discussion. Twenty pairs of 16/17-year-old students were randomly selected from 126 pairs. Ten pairs worked with a diagram before discussion and ten during discussion. The research showed that students use diagrams in very different ways, ranging from a means for talking to just a notebook. Our expectation that using a diagram during discussion leads to more depth in discussion than using one before discussion, was not confirmed. Possible explanations for this finding are structure of the task, and the way students interpreted the goal of the task. 相似文献
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Ruth Wheeldon 《Journal of Science Education and Technology》2012,21(3):403-422
Chemistry students’ explanations of ionisation energy phenomena often involve a number of non-scientific or inappropriate
ideas being used to form causality arguments. Research has attributed this to many science teachers using these ideas themselves
(Tan and Taber, in J Chem Educ 86(5):623–629, 2009). This research extends this work by considering which atomic models are used in pre-service teachers’ explanations and how
that relates to the causality ideas expressed. Thirty-one pre-service teachers were interviewed. Each was asked to describe
and explain four different atomic representations (Rutherford, Electron cloud micrograph, Bohr and Schr?dinger types) in as
much detail as they could. They also provided an explanation for the subsequent ionisation energy values for an oxygen atom
and identified which representations were helpful in explaining the values. Significantly, when pre-service teachers only
used Bohr type representations, they did not use repelling electron ideas in their explanations. However, arguments that were
based on electron–electron repulsion used features from Schr?dinger type atoms. These findings suggest that many pre-service
teachers need to develop their atomic modelling skills so that they select and use models more expertly and that subsequent
ionisation explanations offer a context in which to explore different atomic models’ limitations and their deployment as explanatory
resources. 相似文献
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This study investigated the value of using a scaffolded critique framework to promote two different types of writing—argumentative writing and explanatory writing—with different purposes within an argument-based inquiry approach known as the Science Writing Heuristic (SWH) approach. A quasi-experimental design with sixth and seventh grade students taught by two teachers was used. A total of 170 students participated in the study, with 87 in the control group (four classes) and 83 in the treatment group (four classes). All students used the SWH templates as an argumentative writing to guide their written work and completed these templates during the SWH investigations of each unit. After completing the SWH investigations, both groups of students were asked to complete the summary writing task as an explanatory writing at the end of each unit. All students’ writing samples were scored using analytical frameworks developed for the study. The results indicated that the treatment group performed significantly better on the explanatory writing task than the control group. In addition, the results of the partial correlation suggested that there is a very strong significantly positive relationship between the argumentative writing and the explanatory writing. 相似文献
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Vicente Talanquer 《International Journal of Science Education》2013,35(7):853-870
It has been commonly assumed that teleological explanations are unnecessary and have no place in the physical sciences. However, there are indications that teleology is fairly common in the instructional explanations of teachers and students in chemistry classrooms. In this study we explore the role and nature of teleological explanations and the conditions that seem to warrant their use in chemistry education. We also analyse the learning implications of developing explanations of chemical phenomena within a teleological stance. Our study is based on the qualitative analysis of the instructional explanations presented in traditional chemistry textbooks used in the United States. Our results indicate that teleological explanations are in fact present in these textbooks and help provide an explanatory reason for the occurrence of chemical transformations. Their use is tightly linked to the existence of a rule, principle, or law that governs the behaviour of a chemical system, and that explicitly or implicitly implies the minimisation or maximisation of some intrinsic property. This law or principle tends to provide a sense of preferred direction in the evolution of a transformation. Although teleological explanations seem to have heuristic pedagogical value in chemistry education, they may also lead students to develop alternative conceptions and unwarranted overgeneralisations. 相似文献
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Joëlle Vlassis 《Educational Studies in Mathematics》2002,49(3):341-359
The use of concrete models for teaching students how to solve equations is often debated in scientific literature. This article aims to examine the balance model and to identify the issues that divide scientists. We based our reflections on the results of an empirical study and analysis of the various arguments put forward by supporters and opponents of the model. We describe learning situations that were the subject of the empirical study, which involved forty students in two 8th-grade classes. The aim was to teach the formal solving method, which involved performing the same operations on both sides of the equation using, notably, the balance model. Analysis of students' reasoning showed that the presence of negative numbers gave rise to many errors. The difficulties presented by negative numbers were reviewed, eight months later, during an interview with five students, chosen from those who took part in the experiment. Within that context, we discuss the relevance of the balance model and analyse the arguments put forward by researchers who either defend or reject its use.This revised version was published online in September 2005 with corrections to the Cover Date. 相似文献
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While critical realist (CR) ontological and epistemological perspectives and research approaches are becoming more widely adopted by higher education researchers, the scope of research is relatively limited, and novice researchers in the area still struggle to create rich, in-depth, and critical accounts of these approaches ‘in action’. This article provides an account of teacher-researchers’ exploration of these perspectives in the context of an important aspect their everyday teaching practice – the design of effective curricula and learning environments. The context is research that focused on the design, evaluation, and enhancement of learning environments intended to facilitate students’ development of design thinking expertise. The article outlines the researchers’ CR paradigm positioning and implications for methodologies used to gather, analyse, and theorise data about the response of design and business students to three iterations of a design thinking learning environment. The research involved action research that integrated survey, case study, and theorising methodologies. Examples of data, analyses, and explanatory theory are provided to give insights into specific research tasks and their outcomes. Possible explanations for the findings and their implications for attempts to enhance the learning environment are considered from a CR perspective along with challenges that deploying these approaches may entail. 相似文献
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Marina Martins 《International Journal of Science Education》2019,41(6):713-738
The aims of this paper are twofold. First, we present, justify, and characterise an instrument for analysing students’ argumentative reasoning developed from Walton’s ideas. Then, from the analysis of students’ argumentative discussion about a socio-scientific controversy, we identify the advantages and disadvantages of using the instrument. The results show that the analysis of students’ argumentative reasoning require nine stages, which have logical and pragmatic criteria that should be used in order to decrease the subjectivity of the analysis. The analysis sheds light on the characterisation of students’ argumentative reasoning by supporting the understanding of the move of students’ argumentative clusters, since it enables us to understand that: the argumentative quality depends on the relations between arguments and other statements; and an argumentative cluster can be developed according to the frequency of refutations or attacks by means of questions involving its constituents. This is because when arguments, questions, and/or claims are evaluated, the individuals have the possibility of bringing other reasons and/or arguments that support them in the discussion. Therefore, the main contribution of this study is the development of an instrument, based on dialectical principles, that contributes to analyse students’ argumentative discuss and to support discussions of their argumentative quality. 相似文献
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This article explores how students' mathematical representations can be used as formative assessments. We introduce a framework for teaching and learning that integrates representations as instructional and assessment tools, and illustrate these uses of student representations with reference to a study conducted with 250 5th-grade students. This study focused on students' ability to recognize and use a variety of representations of the fraction concept. Finally, we discuss the implications of the framework for teacher knowledge and classroom practice. 相似文献
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Ernest Braun 《International Journal of Science Education》2013,35(2):225-229
The purpose of this research project was to study how students in the first years of elementary school (children from 7 to 10 years of age) are initiated into the construction of explanations of physical phenomena in the teaching of science. With this purpose in mind, we organized classes based on the proposition of investigative problems, where children, working in groups, could solve problems by raising and testing their own hypotheses. They would then attempt, by means of general discussion organized by the teacher, to discuss how each problem was solved and why it worked. We videotaped a series of classes in which the students solved 15 different investigative problems. We also analysed the teacher/student interactions that took place (in this paper, we present data on two of these classes). Based on our data we found that students construct their own causal explanations by following a sequence of stages that includes the appearance of novelties. We also discuss how our data relate to the teacher's role in the classroom and to the organization of science teaching at this level. 相似文献