From “truth” to “invented reality”: A discourse analysis of high school physics students' talk about scientific knowledge

Students' views of the nature of scientific knowledge have been recognized as an important component of science learning environments. In this study, we analyze an extensive data base consisting of 23 students' written and oral discourse about ontology, epistemology, and sociology of scientific knowledge collected over a 15-month period in the context of two consecutive junior- and senior-level physics courses. Over a 2-month period at the beginning of the second year, students read, reflected on, and talked about a text which discusses epistemology in the context of physics. Our study shows that students drew on nine types of discursive resources to support their ontological, epistemological, and sociological claims. Toward the end of the study, the range and number of supportive statements had increased. Simultaneously, few students changed their ontological and sociological claims, but a considerable number changed their epistemological claims. Two case studies illustrate the development of student discourse in the course of the study. © 1997 John Wiley & Sons, Inc. J Res Sci Teach 34 : 145–179, 1997.     

The interplay of scientific epistemological views,learning strategies,and attitudes of college students

This paper focuses on research that illustrates the important interplay between students' scientific epistemological views and their learning strategies. We address the problem of facilitating meaningful science learning as contrasted to rote memorization, which is practiced by many students and encouraged by instructional and evaluation practices. We show that when metacognitive tools are used to facilitate meaningful learning, positive consequences in learning of subject matter, attitudes toward science, and epistemological views can emerge. Positivistic epistemology continues to be the subtle enemy to encouraging meaningful learning and constructivist views of the nature of science and knowing. If you're a scientist, you can say that all knowledge is scientific and everything can be based on fact and experiment. I've taken so many science classes that I've started to believe that.     

Promoting elementary students’ epistemology of science through computer-supported knowledge-building discourse and epistemic reflection

This study examined the role of computer-supported knowledge-building discourse and epistemic reflection in promoting elementary-school students’ scientific epistemology and science learning. The participants were 39 Grade 5 students who were collectively pursuing ideas and inquiry for knowledge advance using Knowledge Forum (KF) while studying a unit on electricity; they also reflected on the epistemic nature of their discourse. A comparison class of 22 students, taught by the same teacher, studied the same unit using the school’s established scientific investigation method. We hypothesised that engaging students in idea-driven and theory-building discourse, as well as scaffolding them to reflect on the epistemic nature of their discourse, would help them understand their own scientific collaborative discourse as a theory-building process, and therefore understand scientific inquiry as an idea-driven and theory-building process. As hypothesised, we found that students engaged in knowledge-building discourse and reflection outperformed comparison students in scientific epistemology and science learning, and that students’ understanding of collaborative discourse predicted their post-test scientific epistemology and science learning. To further understand the epistemic change process among knowledge-building students, we analysed their KF discourse to understand whether and how their epistemic practice had changed after epistemic reflection. The implications on ways of promoting epistemic change are discussed.     

Helping students make meaning of authentic investigations: findings from a student–teacher–scientist partnership

As student–teacher–scientist partnerships become more widespread, there is a need for research to understand the roles assumed by scientists and teachers as they interact with students in general and in inquiry learning environments in particular. Although teacher roles during inquiry learning have been studied, there is a paucity of research about the roles that scientists assume in their interactions with students. Socio-cultural perspectives on learning emphasize social interaction as a means for students to make meaning of scientific ideas. Thus, this naturalistic study of classroom discourse aims to explore the ways scientists and teachers help high school students make meaning during authentic inquiry investigations. Conversational analysis is conducted of video recordings of discussions between students and teachers and students and scientists from two instances of a student–teacher–scientist partnership program. A social semiotic analytic framework is used to interpret the actions of scientists and teachers. The results indicate a range of common and distinct roles for scientists and teachers with respect to the conceptual, social, pedagogical, and epistemological aspects of meaning making. While scientists provided conceptual and epistemological support related to their scientific expertise, such as explaining scientific phenomena or aspects of the nature of science, teachers played a critical role in ensuring students’ access to this knowledge. The results have implications for managing the division of labor between scientists and teachers in partnership programs.     

High school students’ scientific epistemological beliefs,self-efficacy in learning physics and attitudes toward physics: a structural equation model

Background: There are some theoretical evidences that explain the relationships between core beliefs (i.e., epistemological beliefs) and peripheral beliefs (self-efficacy in learning) in the literature. The close relationships of such type of beliefs with attitudes are also discussed by some researchers. Constructing a model that investigates these relationships by considering theoretical and empirical evidences can empower researchers to discuss these relationships more comprehensively.

Purpose: The purpose of this study is to explore the relationships among Turkish high school students’ scientific epistemological beliefs, self-efficacy in learning physics and their attitudes toward physics.

Sample: A total of 632 high school students participated in this study; however, 269 female and 229 male (a total of 498) high school students’ data were used.

Design and methods: Three distinct instruments that measure scientific epistemological beliefs, self-efficacy in learning physics and attitudes toward physics were combined into a unique questionnaire form and it was distributed to high school students. To explore the relationships among these variables, structural equation modeling was used.

Results: The results showed that scientific epistemological belief dimensions uncovered by the nature of knowing (source and justification) significantly and positively related to both self-efficacy in learning physics and attitudes toward other important physics dimensions. Additionally, self-efficacy in learning physics significantly and positively predicted attitudes toward multiple physics dimensions (importance, comprehension and requirement). However, epistemological belief dimensions related to the nature of knowledge (certainty and development) did not have significant impact on self-efficacy in learning physics or attitudes toward physics.

Conclusions: This study concludes that there are positive and significant relationships among Turkish high school students’ scientific epistemological beliefs, self-efficacy in learning physics and their attitudes toward physics.     

The nature of scientific knowledge and student learning: Two longitudinal case studies

This study was designed to investigate the relationship between students' views of the nature of scientific knowledge and their own learning of physics, and the evolution of this relationship over time. Twenty-three students enrolled in a physics course that emphasised laboratory work and discussions about the nature of science. Over a 15-month period, an extensive data base was established including student essays and interviews regarding their views of the nature of science and teaching and learning of physics. As part of an extensive data generation, students read a book on the epistemology of physics, wrote reflective essays, and subsequently discussed the epistemology of physics in class. Two intensive case studies are used to illustrate our understanding of students' views over time. Changes in students' views concerning the nature of scientific knowledge and of the science teaching and learning process, which were not always complementary, are described with the aid of a model. The findings of this research have direct relevance to the planning and implementation of science courses in which the development of understandings of the nature of science is an objective.     

High school students' ideas about theories and theory change after a biological inquiry unit

Students' epistemological beliefs about scientific knowledge and practice are one important influence on their approach to learning. This article explores the effects that students' inquiry during a 4‐week technology‐supported unit on evolution and natural selection had on their beliefs about the nature of science. Before and after the study, 8 students were interviewed using the Nature of Science interview developed by Carey and colleagues. Overall, students held a view of science as a search for right answers about the world. Yet, the inconsistency of individuals' responses undermines the assumption that students have stable, coherent epistemological frameworks. Students' expressed ideas did not change over the course of the intervention, suggesting important differences between students' talk during inquiry and their abilities to talk epistemologically about science. Combined with previous work, our findings emphasize the crucial role of an explicit epistemic discourse in developing students' epistemological understanding. © 2003 Wiley Periodicals, Inc. J Res Sci Teach 40: 369–392, 2003     

Exploring the Development of Pre-Service Science Elementary Teachers’ Pedagogical Content Knowledge

This paper explores how a group of pre-service elementary science student teachers came to understand the development of their Pedagogical Content Knowledge (PCK) over the course of a semester??s study in a science methods course. At the start of the semester, PCK was introduced to them as an academic construct and as a conceptual tool that they could use to plan for, and assess, the development of their professional knowledge and practice as beginning science teachers. All participants were provided with a tool known as a CoRe (Content Representation) and the manner in which they worked with the CoRe was such that it supported them in planning for and assessing their own learning about teaching elementary science through a focus on the development of their PCK. Through analysis of data derived from the application of a CoRe based methodology (modified and adapted for this study) to the teaching of the science topic of Air, participants?? reasons for, confidence in, and perceived meaningfulness of their learning about science teaching could be examined. In so doing, the nature of participants?? PCK development over time was made explicit. The results illustrate real possibilities for ways of enhancing student teachers?? ongoing professional learning in teacher preparation and offer a window into how the nature of PCK in pre-service education might be better understood and developed.     

理科教师的科学本质观对科学教育的影响

人们对科学本质的认识经历了由科学的“真理观”向科学的“建构观”的转变。不同的科学本质观将直接影响着教师对科学教育目标的不同理解,对科学知识的不同选择,对教学主题的不同设计、教学话语的不同使用,对学生学习的不同评价。教师不同的科学本质观及其教学行为影响着学生的科学本质观的形成,影响着学生对科学内容的理解以及看待问题的思维方式。     

Meeting the Discipline-Culture Framework of Physics Knowledge: A Teaching Experience in Italian Secondary School

The paper deals with physics teaching/learning in high school. An investigation in three upper secondary school classes in Italy explored the reactions of students to a structuring lecture on optics within the discipline-culture (DC) framework that organises physics knowledge around four interrelated fundamental theories of light. The lecture presented optics as an unfolding conceptual discourse of physicists regarding the nature of light. Along with the knowledge constructed in a school course of a scientific lyceum, the students provided epistemological comments, displaying their perception of physics knowledge presented in the classroom. Students’ views and knowledge were investigated by questionnaires prior to and after the lecture and in special discussions held in each class. They revealed a variety of attitudes and views which allowed inferences about the potential of the DC framework in an educational context. The findings and interpretation indicate the positive and stimulating impact of the lecture and the way in which DC-based approach to knowledge organization makes physics at school cultural and attractive.     

Epistemological Issues Concerning Computer Simulations in Science and Their Implications for Science Education

Computers and simulations represent an undeniable aspect of daily scientific life, the use of simulations being comparable to the introduction of the microscope and the telescope, in the development of knowledge. In science education, simulations have been proposed for over three decades as useful tools to improve the conceptual understanding of students and the development of scientific capabilities. However, various epistemological aspects that relate to simulations have received little attention. Although the absence of this discussion is due to various factors, among which the relatively recent interest in the analysis of longstanding epistemological questions concerning the use of simulations, the inclusion of this discussion on the research agenda in science education appears relevant, if we wish to educate scientifically literate students in a vision of the nature of science closer to the work conducted by researchers today. In this paper we review some contemporary thoughts emerging from philosophy of science about simulations in science and set out questions that we consider of relevance for discussion in science education, in particular related with model-based learning and experimental work.     

EPISTEMOLOGICAL BELIEFS IN SCIENCE: AN EXPLORATORY STUDY OF LEBANESE UNIVERSITY STUDENTS’ EPISTEMOLOGIES

Beliefs about the nature of knowledge and knowing have been investigated extensively in educational and developmental psychology research. Hofer??s framework on personal epistemology is adopted in the present study for assessing Lebanese university students?? epistemologies of science. Participants were 213 students in their first year of science-related studies at a private university in Beirut. Two instruments were used for data collection: The science-focused epistemological beliefs questionnaire (Hofer, 2000) and an 8-item instrument adapted from the modified version of the ??Views on Science?CTechnology?CSociety?? (Dogan & Abd-El-Khalick, 2008), and an additional item developed by the authors. Thirty students were purposively selected for completing the second instrument followed by a semi-structured interview. Data analysis yielded the following assertions regarding students?? epistemologies of science: (1) Scientific knowledge is liable to change; (2) the source of scientists?? knowledge is inherent to human??s construction, whereas the source of personal knowledge is independent from human subjectivity and based on external authority; (3) scientific knowledge is proven and validated through the concerted effort of scientists; and (4) absolute truth cannot be attained because of the lack of means to access knowledge. Findings highlighted the need to foster an academic culture that promotes students?? epistemologies and explicitly addresses the nature and processes of science in curricula and instruction.     

Promoting cognitive and social aspects of inquiry through classroom discourse

We investigated how Chinese physics teachers structured classroom discourse to support the cognitive and social aspects of inquiry-based science learning. Regarding the cognitive aspect, we examined to what extent the cognitive processes underlying the scientific skills and the disciplinary reasoning behind the content knowledge were taught. Regarding the social aspect, we examined how classroom discourse supported student learning in terms of students' opportunities to talk and interaction patterns. Our participants were 17 physics teachers who were actively engaged in teacher education programs in universities and professional development programs in local school districts. We analyzed one lesson video from each participating teacher. The results suggest both promises and challenges. Regarding the cognitive aspect of inquiry, the teachers in general recognized the importance of teaching the cognitive processes and disciplinary reasoning. However, they were less likely to address common intuitive ideas about science concepts and principles. Regarding the social aspect of inquiry, the teachers frequently interacted with students in class. However, it appeared that facilitating conversations among students and prompting students to talk about their own ideas are challenging. We discuss the implications of these findings for teacher education programs and professional development programs in China.     

Positions Toward Science Studies in Medicine Among University Graduates of Medicine and the Teenaged Participants of the ��Medical Systems�� Study Program

The ??Medical Systems?? program was designed to introduce high school students to the world of advanced medicine. Its premise was to use an applied scientific discipline like medicine to encourage high-school students?? interest in basic science. This study compares the teen-aged graduates of ??Medical Systems?? with fourth and fifth-year medical students. It aims to identify the attitudes of these two groups towards medical science and basic sciences in medicine. The population included 94 graduates of ??Medical Systems?? from schools throughout Israel, who had also completed an advanced-level course in a basic science (biology, chemistry or physics), and 96 medical students from different Israeli universities. The students?? attitudes were measured using West et al.??s questionnaire (Med Educ 16(4):188?C191, 1982), which assesses both the attitude of the participants towards basic science knowledge, and their attitude towards their learning experience in medical school. Nine participants from each group were also interviewed using a semi-structured interview protocol. The results showed essential differences in the attitudes of the two groups. The high school students consider scientific knowledge far more essential for a physician than do the medical students, who also showed a far lower estimation of the effectiveness of their science studies.     

Why Implementing History and Philosophy in School Science Education is a Challenge: An Analysis of Obstacles

Teaching and learning with history and philosophy of science (HPS) has been, and continues to be, supported by science educators. While science education standards documents in many countries also stress the importance of teaching and learning with HPS, the approach still suffers from ineffective implementation in school science teaching. In order to better understand this problem, an analysis of the obstacles of implementing HPS into classrooms was undertaken. The obstacles taken into account were structured in four groups: 1. culture of teaching physics, 2. teachers?? skills, epistemological and didactical attitudes and beliefs, 3. institutional framework of science teaching, and 4. textbooks as fundamental didactical support. Implications for more effective implementation of HPS are presented, taking the social nature of educational systems into account.     

Thought Experiments: Determining Their Meaning

This paper considers thought experiment as a special scientific tool that mediates between theory and experiment by mental simulation. To clarify the meaning of thought experiment, as required in teaching science, we followed the relevant episodes throughout the history of science paying attention to the epistemological status of the performed activity. A definition of thought experiment is suggested and its meaning is analyzed using two-dimensional conceptual variation. This method allows one to represent thought experiment in comparison with the congenerous conceptual constructs also defined. A similar approach is used to classify the uses of thought experiments, mainly for the purpose of science curriculum.

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The Importance of History and Philosophy of Science in Correcting Distorted Views of ‘Amount of Substance’ and ‘Mole’ Concepts in Chemistry Teaching

The knowledge of historical facts can help teachers and students to correctly appreciate a variety of scientific theories. It is important to be aware of the evolution of the basic concepts, particularly the ones our students find very abstract and therefore difficult to understand. Historical knowledge of chemical concepts will allow us to understand their difficulties and make them easier to teach successfully. In this paper we answer the following research questions: what was the historic and sociologic context in which chemical equivalent, mole and its magnitude amount of substance were introduced to science? How the lack of historic knowledge in science teaching contributes to the presence of distorted views of science and hampers meaningful learning?     

The historicity of the physics class: enactments,mimes and imitation

This essay discusses Anna Danielsson’s article “In the physics class: university physics students’ enactments of class and gender in the context of laboratory work”. The situated co-construction of knowledge and identity forms the crucial vantage point and I argue that it is a point of intersection between the history of science and research in science education. The former can provide a valuable understanding of the historicity of learning science. I thus highlight the importance of knowledge as situated in time and space, for instance the importance of the historical division between “head and hand” clearly visible in the discourse of Danielsson’s informants. Moreover, the article discusses how identity is produced in specific knowledge contexts through repeated performances. The article closes by briefly suggesting analytical alternatives, in particular “belonging” and “imitation”. Both draw on post-structuralist ideas about the citational nature of identity. Belonging is created by citing and reinstating norms. Imitating knowledge, identity and norms is an issue that should be brought to the fore when we speak of education and training.