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1.
Evaluating Instrument Quality in Science Education: Rasch‐based analyses of a Nature of Science test
Irene Neumann Knut Neumann Ross Nehm 《International Journal of Science Education》2013,35(10):1373-1405
Given the central importance of the Nature of Science (NOS) and Scientific Inquiry (SI) in national and international science standards and science learning, empirical support for the theoretical delineation of these constructs is of considerable significance. Furthermore, tests of the effects of varying magnitudes of NOS knowledge on domain‐specific science understanding and belief require the application of instruments validated in accordance with AERA, APA, and NCME assessment standards. Our study explores three interrelated aspects of a recently developed NOS instrument: (1) validity and reliability; (2) instrument dimensionality; and (3) item scales, properties, and qualities within the context of Classical Test Theory and Item Response Theory (Rasch modeling). A construct analysis revealed that the instrument did not match published operationalizations of NOS concepts. Rasch analysis of the original instrument—as well as a reduced item set—indicated that a two‐dimensional Rasch model fit significantly better than a one‐dimensional model in both cases. Thus, our study revealed that NOS and SI are supported as two separate dimensions, corroborating theoretical distinctions in the literature. To identify items with unacceptable fit values, item quality analyses were used. A Wright Map revealed that few items sufficiently distinguished high performers in the sample and excessive numbers of items were present at the low end of the performance scale. Overall, our study outlines an approach for how Rasch modeling may be used to evaluate and improve Likert‐type instruments in science education. 相似文献
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Science & Education - Current visions of science education advocate that students should engage with science in the classroom in ways that mirror the work of scientists in order to develop... 相似文献
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Representing Nature of Science in a Science Textbook: Exploring author–editor–publisher interactions
Maurice DiGiuseppe 《International Journal of Science Education》2013,35(7):1061-1082
Current reforms in elementary and secondary science education call for students and teachers to develop more informed views of the nature of science (NOS)—a process in which science textbooks play a significant role. This paper reports on a case study of the development of representations of the NOS in a senior high school chemistry textbook by the book's author, editor, and publisher. The study examines the multiple discourses that arose as the developers reflected on their personal and shared understandings of NOS; squared these with mandated curricula, the educational needs of chemistry students and teachers, and the exigencies of large-scale commercial textbook publishing. As a result, the team developed and incorporated, in the textbook, representations of NOS they believed were the most pedagogically suitable. Analysis of the data in this study indicates that a number of factors significantly influenced the development of representations of NOS, including representational accuracy (the degree to which representations of NOS conformed to informed views of the NOS), representational consistency (the degree to which representations of NOS in different parts of the book conveyed the same meaning), representational appropriateness (the age-, grade-, and reading-level appropriateness of the NOS representations), representational alignment (the degree to which NOS representations aligned with mandated curriculum), representational marketability (the degree to which NOS representations would affect sales of the textbook), and ‘Workplace Resources’ factors including availability of time, relevant expertise, and opportunities for professional development. 相似文献
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《欧洲教育》2013,45(3-4):130-135
In the second May issue of the Deutsche Universitäts-Zeitung [German University Journal] there was an article entitled "Is There Still Any Demand for German?" by Doctor Maas, which deals rather thoroughly with the importance of the German language and generally gives a positive impression, even in the realm of science. I have taken Dr. Maas's article as an opportunity to present my own observations over the years on this topic. The changes I have observed are not positive. In my opinion, their effects are harmful over the long term. 相似文献
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Research in Science Education - Much has been written and debated on the importance of including moral, character or values education in school curricula. In line with this, teachers’ views... 相似文献
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A view of science as a culturally‐mediated way of thinking and knowing suggests that learning can be defined as engagement with scientific practices. How students engage in school science is influenced by whether and how students view themselves and whether or not they are the kind of person who engages in science. It is therefore crucial to understand students' identities and how they do or do not overlap with school science identities. In this paper, we describe four middle school African American girls' engagement with science. They were selected in the 7th grade because they expressed a fondness for science in school or because they had science‐related hobbies outside of school. The data were collected from the following sources: interviews of students, their parents and their teachers; observations in science classes; journal writing; and focus groups. These girls' stories provide us with a better understanding of the variety of ways girls choose to engage in science and how this engagement is shaped by their views of what kind of girl they are. © 2000 John Wiley & Sons, Inc. J Res Sci Teach 37: 441–458, 2000. 相似文献
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Pre-Service Teachers’ Maturing Perceptions of a TPACK-Framed Signature Pedagogy in Science Education
《学校用计算机》2012,29(1-2):53-69
Teacher education programs across North America are transforming. What were once piecemeal programs consisting of often unrelated courses are now becoming coherent and intertwined trajectories toward teacher certification. Part of this transformation can be attributed to the weaving of “signature pedagogies” throughout overarching program frameworks. A modern signature pedagogy within science teacher education is the integration of technology with science area content and effective pedagogy. In this article the author reports an action research study aimed toward promoting the “scholarship of teaching” of pre-service teachers through articulating changes in their maturing perceptions of the integrated relationship between technological, pedagogical, and science content knowledge. 相似文献
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G. Leblebicioglu D. Metin E. Capkinoglu P. S. Cetin E. Eroglu Dogan R. Schwartz 《Science & Education》2017,26(7-9):889-917
Although nature of science (NOS) and nature of scientific inquiry (NOSI) are related to each other, they are differentiated as NOS is being more related to the product of scientific inquiry (SI) which is scientific knowledge whereas NOSI is more related to the process of SI (Schwartz et al. 2008). Lederman et al. (Journal of Research in Science Teaching, 51, 65–8, 2014) determined eight NOSI aspects for K-16 context. In this study, a science camp was conducted to teach scientific inquiry (SI) and NOSI to 24 6th and 7th graders (16 girls and 8 boys). The core of the program was guided inquiry in nature. The children working in small groups under guidance of science advisors conducted four guided-inquiries in the nature in morning sessions on nearby plants, animals, water, and soil. NOSI aspects were made explicit during and at the end of each inquiry session. Views about scientific inquiry (VASI) (Lederman et al. Journal of Research in Science Teaching, 51, 65–8, 2014) questionnaire was applied as pre- and post-test. The results of the study showed that children developed in all eight NOSI aspects, but higher developments were observed in “scientific investigations all begin with a question” and “there is no single scientific method,” and “explanations are developed from data and what is already known” aspects. It was concluded that the science camp program was effective in teaching NOSI. 相似文献
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Nancy Romance Michael Vitale 《International Journal of Science and Mathematics Education》2017,15(6):979-995
Reported are the results of a multiyear study in which reading comprehension and writing were integrated within an in-depth science instructional model (Science IDEAS) in daily 1.5 to 2 h daily lessons on a schoolwide basis in grades 3–4–5. Multilevel (HLM7) achievement findings showed the experimental intervention resulted in significant and consistent direct effects in grades 3–4–5 and complementary transfer effects in grades 6–7 on both ITBS Science (+1.08 Grade Equivalent Units [GE]) and ITBS Reading (+.57 GE). Discussed are implications of the findings and related research for changing grade K-5 curriculum policy to allocate increased instructional time for integrated science instruction. 相似文献
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Objective:To construct a eukaryotic expression plasmid pcDNA3.1(-)-Humanin.Methods:The recombinant plasmidpGEMEX-1-Humanin was digested with restriction endonucleases BamH Ⅰ and Hind Ⅲ and the Humanin gene fragments,about100 bp length,were obtained.Then the Humanin gene fragments were inserted into eukaryotic expression vector pcDNA3.1(-)andthe recombinant plasmids pcDNA3.1(-)-Humanin were identified by sequencing.Results:Recombinant plasmid DNA success-fully produced a band which had the same size as that of the thimauin positive control.The sequence of recombinant plasmidsaccorded with the Humnain gene sequence.Conclusions:A eukaryotic expression plasmid of Humanin was successfully con-structed. 相似文献
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Fritz Kubli 《Interchange》2010,41(4):315-321
Reflection on several decades of science teaching at the secondary-school level leads to the strong suggestion that a theory
of science education should be based on arguments emanating from insights into the process of meaningful communication in
the light of modern epistemology. These arguments show that the teacher’s personality and engagement with the subject is a
major source of interest and devotion of students who try to understand the presented ideas. An analysis of the conditions
of this engagement leads to a vision for a future understanding of the teaching process, especially in science teaching. 相似文献
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Paolo Manzelli 《International Journal of Science Education》2013,35(3):253-260
Summaries English Before constructing a new curriculum for any level in integrated‐science education, it is very important to establish a basic philosophy of science teaching which reflects a symbiotic relationship between education and the socio‐economic development in a particular country of the world. The curriculum structure of integrated‐science education should broaden the basis of curricular decision and should be designated to follow the expectations of the society in providing professional intellectual training so that education can make a significant contribution to the socio‐economic growth of the country. This basic assumption which established a link between cultural and socio‐economic growth, involves a diversification of the cultural trends of science education which must become appropriate to the economic and historical context of each country in a fast changing world of work. Therefore, by critically removing outside influences in the transmission of scientific knowledge, there should be less uniformity in the context and methods of teaching, and considerable restructuring of education for each country should occur. Thus, considering the historical and geographical differences, a new order in international division of labour would come into being. In such a hypothesis, a research‐oriented integrated curriculum in science education can play a central role (certainly a better one than in the traditional, discipline‐oriented scheme of science teaching) in obtaining an adequate interaction between scientific education and social problems; this is required for modern cultural and economic development of the world. 相似文献
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Michalinos Zembylas 《Research in Science Education》2004,34(4):343-364
Science teaching environments are social environments, and teachers emotions interact with their science teaching in powerful ways. To value the teacher is to value the whole person, not just the intellect. In this paper, a theorization of teacher emotion in science teaching is developed which illustrates the role of emotion in establishing and maintaining self-esteem in science teaching situations. From the standpoint of social-constructionist theory of emotion, it is argued that emotion is a social construction within social relationships. Arising from this view, are the emotions of intellectual excitement, frustration and shame that play a key role in the development of self-esteem. The dynamics of these emotions, in the context of experiences of success and failure, may dispose teachers to act positively or negatively towards science teaching. The theorisation developed is illustrated in the emotional experiences of an elementary school teacher in an early childhood science classroom. These experiences indicate that emotion is constitutive of teaching, and merits greater consideration in science teaching. 相似文献
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This research focuses on use of a triadic teaching approach in a science–technology–society (STS) course designed for future
science teachers for middle schools in Turkey. Forty-three pre-service science teachers were enrolled in a semester-long course
organized around issues students identified and used throughout the semester. The triadic teaching approach includes library-online
searches that lead the students to design and conduct investigations, to carrying out mini-scientific symposia, and to preparing
and conducting poster presentations open to the entire student body and faculty. The results of a 30-item Likert scale, administered
to the students as a pretest and a posttest, indicated that there were significant increases in positive attitudes towards
STS issues from the beginning to the end of the study. Individual interviews were also conducted with the students to determine
the individual effects of each component of the triadic teaching approach on their attitudes towards STS issues. All aspects
of the new approach provided significant contributions to the development of more positive attitudes among the students towards
STS via interviews and on all sub-scales of a survey administered that include: (1) pupil interest in STS issues; (2) teacher
interest in STS issues; (3) general perceptions regarding importance of STS issues.
相似文献
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Mehmet Karakas 《Journal of Science Education and Technology》2009,18(2):101-119
Study provides qualitative analysis of data that answers the following research question: how college science faculty teach science and NOS and incorporate aspects of NOS and the history of science into their undergraduate courses? Study concentrates on four cases and more specifically on three introductory science classes and on four instructors who taught those courses. These instructors were chosen as case studies to explore in greater detail what occurs inside introductory science courses in one particular higher institution in the Northeastern United States. Participants’ teaching styles are presented through a combined and detailed presentation of interview data and classroom observations supported with examples from their classroom activities. Constant comparative approach was used in the process of organizing and analyzing data. Findings revealed that participants preferred to use the traditional teacher-centered lecturing as their teaching style and whose main concern was to cover more content, develop the problem solving skills of their students, and who wanted to teach the fundamental principles of their subjects without paying special importance to the NOS aspects. The study also revealed that other variables of teaching science, such as large class size, lack of management and organizational skills, teaching experience, and instructors’ concerns for students’ abilities and motivation are more important for these scientists then teaching for understanding of NOS. 相似文献