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Ladewig Antonia Köller Olaf Neumann Knut 《European Journal of Psychology of Education - EJPE》2023,38(1):435-454
The German Physics Olympiad is an extracurricular science contest for students. Here, they have the opportunity to compete against other talented students, can do physics outside of school, and take a first step to more engagement in the domain. Yet, female students participate in the competition in fewer numbers and are disproportionally more likely to drop out of the contest earlier than the male students.
The present study hence explored the question to which extent the German Physics Olympiad provides a threatening environment for female contestants’ intentions of persisting in physics. A total of 298 participants (28% female) were surveyed with respect to stereotype and social identity threat, as well as gender identification and sense of belonging as predictors of success expectations for and value of choosing to study physics. Success expectations and value of choosing to study physics were used as a measure for career intentions within the expectancy-value model.
The results support the conclusion that the contest presents an equally supporting environment for female and male participants. We found no gender differences in success expectations for and value of studying physics. Sense of belonging and gender identification significantly predicted success expectations but not value of choosing to study physics. Female participants in the German Physics Olympiad were also neither affected by stereotype threat nor by social identity threat in their sense of belonging or gender identification.
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Jolina H. Ruckert 《Early education and development》2016,27(8):1130-1144
Research Findings: This study investigated folkbiological concepts that structure children’s moral reasoning regarding conservation. Participants (N = 52; 7- and 10-year-olds, gender balanced) were interviewed regarding their values, moral obligations, and rights concerns for endangered and extinct animals. Across the 2 ages, children drew on the animal’s living status and teleology, as well as ecological relations, to ground their moral reasoning. Developmentally speaking, the younger children employed both nature-centered and human-centered moral reasoning, whereas the older children employed a complex form of moral reasoning that integrated human models of moral thinking with distinct biological understanding. Practice or Policy: The findings can improve education and policy that supports the next generation of conservationists. Educators can draw on these findings to develop class material and activities that teach children about ecological relations—knowledge children can employ to construct their moral arguments for conservation and protecting the environment. The findings revealed that children think about and value endangered animals in deep and beautiful ways. Policymakers can draw on the findings to frame their decision making—drawing more deeply on children’s values of the natural world to inform policy decisions. Drawing on children’s values in the development of environmental policy engages them in the policy process. 相似文献
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Anna Emilia Berti Valentina Barbetta Laura Toneatti 《International Journal of Science and Mathematics Education》2017,15(2):215-232
This study examines how third-graders’ conceptions about the origin of species are affected by formal instruction and whether children can learn not only about evolution but also about natural selection. We interviewed the same group of third-grade children (8–9 years old) twice, before and after following a curriculum about these topics. Creationist answers were very rare at both pre- and post-tests. The number of evolutionist answers increased significantly after instruction. However, children learned about evolution in a piecemeal way; they gave evolutionist answers for only some of the animals they were asked about and made several errors when putting classes of vertebrates on a time line. In addition, only a minority of children learned something about evolutionary mechanisms. They said that new-born animals can be different from the parents because of mutations but did not mention differential survival. These results challenge the views, according to which, cognitive biases (i.e. essentialism, teleological and intentional thinking) make children unreceptive to evolution. 相似文献
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Bioinformatics, merging biological data with computer science, is increasingly incorporated into school curricula at all levels.
This case study of 10 secondary school students highlights student individual differences (especially the way they processed
information and integrated procedural and analytical thought) and summarizes a variety of critical situations that teachers
may encounter when teaching bioinformatics. Students who integrated factual information with procedural and analytical skills
were closest to content mastery; while students who had fundamental deficiencies in factual recall or were less adept in integrating
higher order knowledge with specific facts and procedural skills had difficulty mobilizing critical analytical skills needed
to master the bioinformatics tasks. Broader implications are presented for teacher education, curriculum design, and research. 相似文献
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Jonathan Hodge 《Science & Education》2013,22(9):2267-2294
This essay is an interpretation of Charles Darwin’s Origin of Species. It focuses on the contents of the Origin as Darwin intended them to be understood and the background to the work, thus revealing the originality (or otherwise) of the work. 相似文献
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Pierre Deleporte 《Science & Education》2012,21(10):1535-1544
The Bungian philosophical system, with its constant focus on the demarcation between concepts and coherent material systems, is particularly helpful for introducing scientists and students to the ontology of biological systems. We illustrate this with the case of the debate about species as individuals, largely a concern for philosophers of biology rather than biologists themselves, but potentially confusing for the latter when engaging in philosophical reflection about their conceptions and practice. Bunge attains his goal of writing efficiently for readers outside the philosophical academic microcosm, and the Bungian system is worth more promotion for a large audience, particularly for introducing notions of modern systemist emergentist philosophy in biological scientific training. 相似文献
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Species concepts and biodiversity in Trichoderma and Hypocrea：from aggregate species to species clusters？ 总被引：2，自引：0，他引：2
Trichoderma/Hypocrea is a genus of soil-borne or wood-decaying fungi containing members important to mankind as producers of industrial enzymes and biocontrol agents against plant pathogens, but also as opportunistic pathogens of immuno-compromised humans. Species identification, while essential in view of the 相似文献
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Objective: Embryonic chromosomal abnormality is one of the main reasons for in vitro fertilization (IVF) failure. This study aimed at evaluating the value of Fluorescence in-situ Hybridization (FISH)-based Preimplantation Genetic Diagnosis (PGD) in screening for embryonic chromosomal abnormality to increase the successful rate of IVF. Method: Ten couples, four with high risk of chromosomal abnormality and six infertile couples, underwent FISH-based PGD during IVF procedure. At day 3, one or two blastomeres were aspirated from each embryo. Biopsied blastomeres were examined using FISH analysis to screen out embryos with chromosomal abnormalities. At day 4, embryos without detectable chromosomal abnormality were transferred to the mother bodies as in regular IVF. Results: Among 54 embryos screened using FISH-based PGD, 30 embryos were detected to have chromosomal abnormalities. The 24 healthy embryos were implanted, resulting in four clinical pregnancies, two of which led to successful normal birth of two 相似文献
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This study examined the instructional focuses and practices of three Korean heritage language (HL) teachers in community-based HL schools related not only to their constructed identities as HL teachers, but also to their students. Constant-comparative analyses of interviews and classroom observations across the three teacher cases showed that each teacher’s identity as an HL teacher was shaped by her earlier immigration experiences and through her relationships within and across a particular historical and social context. Moreover, the three HL teachers’ identities informed how they identified the imagined communities in which their students would eventually participate. The teachers’ different identifications and visions became significant in shaping their instructional focuses and practices related to teaching language and culture in a manner that would enable their students to learn and, therefore, gain access to their communities. 相似文献
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Roger Enriquez 《Journal of Criminal Justice Education》2013,24(2):254-260
Criminal Justice departments across the country are experiening unprecedented growth. This growth has created a demand for qualified tenure‐track faculty. Obviously, it is important to maintain quality standards for the hiring of tenure‐track faculty during periods of growth. In an effort to improve the quality of Criminal Justice education, the Academy of Criminal Justice Sciences has adopted standards for certification of baccalaureate and graduate degree programs. One area adressed by the ACJS standards is the area of acceptable faculty credentials for certification. For example, graduate programs that desire the ACJS imprimatur cannot have a faculty with more than 1 in 10 faculty members who hold a Juris Doctor degree. Efforts to eliminate the JD from the CJ faculty ranks are misguided. Instead, CJ departments should focus on the individual candiadate. Graduates from top‐tier institutions with a history of scholarly productivity and who possess ample skills in empirical study should not be excluded from tenure‐track consideration solely because they lack a PhD.
The first thing we do, let’s kill all the lawyers.—William Shakespeare, Henry VI (Act IV, Scene II) 相似文献
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Ye M Cao SQ Jiang ST Pan LJ Luo SZ Li XJ 《Journal of Zhejiang University. Science. B》2006,7(1):20-27
INTRODUCTION A large number of Lachnum species have been reported from diverse regions of the world (Dennis, 1949; 1961; Galán and Raitviir, 1994; Haines, 1980; 1992; Haines and Dumont, 1984; Haines and Kaneko, 1984; Sharma, 1986; Singh, 1975; Spooner, 1987; Tai, 1979; Teng, 1934; 1963; Wu et al., 1998; Wu and Haines, 1999; Zhuang and Hyde, 2001). The earliest records of Lachnum in China dated back to 1934 when the Chinese mycologist Teng (1934) reported two species from Zhejian… 相似文献
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Jani L. Barker 《Children‘s Literature in Education》2010,41(2):118-145
Multiethnic children’s literature addresses multiple audiences, providing different reading experiences and benefits for each.
Using critical race theory as an interpretive tool, this article examines how two African American historical fiction novels,
Mildred Taylor’s Roll of Thunder, Hear My Cry and Christopher Paul Curtis’s The Watsons Go to Birmingham—1963, frame anti-racist identifications for readers of all races. It argues that these identifications are key elements in the
novels’ rhetorical strategies for engaging readers and opposing racism. Both novels portray strong African American families
with whom both black and nonblack readers can identify and present African American perspectives on race, but they differ
in how directly they approach racism and how they frame the identification of white readers. The conclusion offers implications
of analyzing race and audience when teaching multiethnic literature. 相似文献
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The nature of science (NOS) is a primary goal in school science. Most teachers are not well-prepared for teaching NOS, but a sophisticated and in-depth understanding of NOS is necessary for effective teaching. Some authors emphasize the need for teaching NOS in context. Species, a central concept in biology, is proposed in this article as a concrete example of a means for achieving increased understanding of NOS. Although species are commonly presented in textbooks as fixed entities with a single definition, the concept of species is a highly discussed one in the science and the philosophy of biology. A multitude of species concepts exist, reflecting both the views and interests of researchers and their utility in different organism groups. The present study serves to address the following questions: How do textbooks in Norwegian primary and lower secondary schools present the concept of species? Can inquiries into the concept of “species” serve to highlight aspects of NOS? A review of the available literature on species and species concepts in school is also performed. In the schoolbooks, the biological species concept is commonly used as the main definition, whereas the morphological species concept is represented by additional remarks of similarity. The potential and pitfalls of using the species concept for teaching NOS are discussed, with NOS being discussed both as a family resemblance concept and as a consensus list. Teacher education is proposed as a starting point for inducing a more sophisticated view of biology into schools. 相似文献
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CHEN Jun-yi CAI Yi-lin XU Li WANG Jiu-guang ZHANG Wen-long LIU Zhi-zai PENG Kun ZHU Zhao-jing HUANG Zu-chun AI Ji-zhou TANG Quan DENG Bu-hu YANG Zhi-guo LUO Jing SUN Shuang-ling 《重庆大学学报(英文版)》2010,9(2):105-116
The phosphorus uptake （PU） in above-ground parts of plant, root characteristics and root exudations as well as the quantitative trait loci （QTLs） associated with these characteristics were determined for a F2：3 population derived from the cross of two contrasting maize （Zea mays L.） genotypes, 082 and Yel07. A total of 241 F2：3 families were evaluated in replicated trials under deficient phosphorus conditions in 2007 at two sites （Kaixian County and Southwest University, Chongqing, P. R. China）. The results show pleiotropy and close linkage among QTLs. Four common regions in different environments were in bnlg100- bnlg1268b （bins 1.02） for QTL of H＋, bnlg1268a-umc1290a （bins 1.09） for QTL of AP （acid phospbatase activity）, dupssrl5- P 1MT/a （bins 6.06） for QTLs of PU （phosphorus uptake） and RW （root weight）, and P IM3/d-P1M3/g （bins9.04） for QTLs of PU and AP. These QTLs are non-environment or minor QTLs x environment. By epistatic analysis, three main QTLs and eighteen QTLs x QTLs interactions were detected for the seven measured characteristics. These QTLs may affect trait expression by epistatic interaction with the other loci, and make a substantial contribution to phosphorus utilization efficiency, which should be considered when breeding maize varieties with high P efficiency. Two regions were detected in dupssrl 5- P1MT/a （bins 6.06） for QTL of RW and P1M3/d- P 1M3/g （bins 9.04） for QTL of PU and AP. They were detected in two different environments and by two methods of QTL analysis, which were useful for marker-assisted selection. 相似文献
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KHOSLA Arun KUMAR Shakti AGGARWAL K.K. 《浙江大学学报(A卷英文版)》2006,7(12):1989-1994
INTRODUCTION The particle swarm optimization (PSO) method is a member of the broad category of swarm intelli- gence techniques for finding optimized solutions. The PSO algorithm is based on the social behavior of animals such as flocking of birds and schooling of fish, etc. PSO has its origin in simulation for visual- izing the synchronized choreography of bird flock by incorporating concepts such as nearest-neighbor ve- locity matching and acceleration by distance (Par- sopoulos and V… 相似文献
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Acoustic signals from diesel engines contain useful information but also include considerable noise components. To extract information for condition monitoring purposes, continuous wavelet transform (CWT) is used for the characterization of engine acoustics. This paper first reviews CWT characteristics represented by short duration transient signals. Wavelet selection and CWT are then implemented and wavelet transform is used to analyze the major sources of the engine front's exterior radiation sound. The research provides a reliable basis for engineering practice to reduce vehicle sound level. Comparison of the identification results of the measured acoustic signals with the identification results of the measured surface vibration showed good agreement. 相似文献
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There is still an obstacle to prevent neural network from wider and more effective applications, i.e. , the lack of effective theories of models identification. Based on information theory and its generalization, this paper introduces a universal method to achieve nonlinear models identification. Two key quantities, which are called nonlinear irreducible auto-correlation (NIAC) and generalized nonlinear irreducible auto-correlation (GNIAC), are defined and discussed. NIAC and GNIAC correspond with intrinstic irreducible auto-dependency (IAD) and generalized irreducible autodependency (GLAD) of time series respectively. By investigating the evolving trend of NIAL; and GNIAC, the optimal auto-regressive order of nonlinear auto-regressive models could be determined naturally, Subsequently, an efficient algorithm computing NIAC and GNIAC is discussed. Experiments on simulating data sets and typical nonlinear prediction models indicate remarkable correlation between optimal auto-regressive order and the highest order that NIAC-GNIAC have a remarkable non-zero value, therefore demonstrate the validity of the proposal in this paper. 相似文献