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1.
Kindergarten Teachers’ Conceptual Framework on the Ozone Layer Depletion. Exploring the Associative Meanings of a Global Environmental Issue 总被引：1，自引：0，他引：1
Maria Daskolia Evgenia Flogaitis Evgenia Papageorgiou 《Journal of Science Education and Technology》2006,15(2):168-178
This paper reports on a study conducted among Greek kindergarten teachers aiming to explore their conceptual frameworks on a major environmental issue of our times: the ozone layer depletion. The choice of this particular issue was premised on its novelty, complexity and abstractness which present teachers with difficulties in its teaching. A free word association task was employed to identify the associative meaning of the issue among the participant teachers. The study’s results revealed the existence of a simplistic, linear, cause-and-effect scheme in the teachers’ conceptual frameworks, the two poles of which are “solar radiation” and “its harmful results for human health”. Some of the well-known misconceptions and misunderstandings already emerged in previous research also arise in this study. Prominent among them are the deeply rooted confusion between the “ozone hole” and “greenhouse effect”, a general fusion of ideas concerning all environmental problems and an overemphasis on the harmful consequences of the ozone depletion on human health. Implications for kindergarten teacher education are also discussed.The present study is part of a research project that is co-funded by the European Social Fund and National Resources – (EPEAEK II) PYTHAGORAS II. 相似文献
2.
Georgios Tsitsipis Dimitrios Stamovlasis George Papageorgiou 《International Journal of Science and Mathematics Education》2012,10(4):777-802
In this study, the effect of 3 cognitive variables such as logical thinking, field dependence/field independence, and convergent/divergent thinking on some specific students’ answers related to the particulate nature of matter was investigated by means of probabilistic models. Besides recording and tabulating the students’ responses, a combination of binomial and multinomial logistic regression techniques was used to analyze the data. Thus, students’ misconceptions as well as the compatible-with-the-scientific-view student’s answers were explored one by one in relation to the above 3 cognitive variables. The study took place with the participation of 329 ninth-grade junior high school pupils (aged 14–15). The results showed that mostly logical thinking and sporadically the other 2 cognitive variables were significantly associated with students’ answers. Interpretation of the results and implications for science education are discussed. 相似文献
3.
Abstract We designed a laboratory test with variable fixed intensities to simulate cross-country mountain biking and compared this to more commonly used laboratory tests and mountain bike performance. Eight competitive male mountain bikers participated in a cross-country race and subsequently did six performance tests: an individual outdoor time trial on the same course as the race and five laboratory tests. The laboratory tests were as follows: an incremental cycle test to fatigue to determine peak power output; a 26-min variable fixed-intensity protocol using an electronically braked ergometer followed immediately by a 1-km time trial using the cyclist's own bike on an electronically braked roller ergometer; two 52-min variable fixed-intensity protocols each followed by a 1-km time trial; and a 1-km time trial done on its own. Outdoor competition time and outdoor time trial time correlated significantly (r = 0.79, P < 0.05). Both outdoor tests correlated better with peak power output relative to body mass (both r = ?0.83, P < 0.05) than absolute peak power output (outdoor competition: r = ?0.65; outdoor time trial: r = ?0.66; non-significant). Outdoor performance times did not correlate with the laboratory tests. We conclude that cross-country mountain biking is similar to uphill or hilly road cycling. Further research is required to design sport-specific tests to determine the remaining unexplained variance in performance. 相似文献
4.
Field and laboratory correlates of performance in competitive cross-country mountain bikers 总被引：1，自引：1，他引：0
We designed a laboratory test with variable fixed intensities to simulate cross-country mountain biking and compared this to more commonly used laboratory tests and mountain bike performance. Eight competitive male mountain bikers participated in a cross-country race and subsequently did six performance tests: an individual outdoor time trial on the same course as the race and five laboratory tests. The laboratory tests were as follows: an incremental cycle test to fatigue to determine peak power output; a 26-min variable fixed-intensity protocol using an electronically braked ergometer followed immediately by a 1-km time trial using the cyclist's own bike on an electronically braked roller ergometer; two 52-min variable fixed-intensity protocols each followed by a 1-km time trial; and a 1-km time trial done on its own. Outdoor competition time and outdoor time trial time correlated significantly (r = 0.79, P < 0.05). Both outdoor tests correlated better with peak power output relative to body mass (both r = -0.83, P < 0.05) than absolute peak power output (outdoor competition: r = -0.65; outdoor time trial: r = -0.66; non-significant). Outdoor performance times did not correlate with the laboratory tests. We conclude that cross-country mountain biking is similar to uphill or hilly road cycling. Further research is required to design sport-specific tests to determine the remaining unexplained variance in performance. 相似文献
5.
AbstractThis article reports on a study that tested theory predicting differences in personality endowments between first-year and second-year accounting students, as well as the potential influence of personality on academic performance in the context of a large South African university. Data from 1 380 first-year and second-year accounting students was used to test theory predicting gendered differences in the relationships between personality and both throughput and performance. Multiple linear regression and multivariate analysis of variance (MANOVA) estimations were applied. The findings suggested that fewer students with openness and agreeableness continue to second-year accounting studies. While conscientiousness might not be a primary differentiator of performance at first year, at second year it dominates as a predictor of performance. The findings are expected to generalise to other contexts to the extent that such contexts share characteristics with the context under study. 相似文献
6.
F. Papageorgiou 《Learning, Media and Technology》1980,6(1):12-14
This note summarises the main points that have arisen from the first phase of the Active Audience project, which the Centre for Television Research has undertaken with sponsorship from the BBC. This research has been designed to look at the nature of the television audience not in the usual way of counting heads and noting down who watches what, but in terms of why people watch television and how they respond to what they are being offered. Essentially this project is exploratory and represents an effort to analyse and understand the experience of the audience with television from two points of view. Firstly, by studying the motivation of the audience to watch television, as shown from the expectations different people attach to their viewing; and secondly, by concentrating more specifically on the perception and interpretation of the broadcast material which may determine programme preferences and strengthen or weaken the motivation of the audience to watch television.
These two ways of looking at television, that is from a ‘general motivation’ and a ‘perception and meaning’ angle, have been explored during the initial phase of the research, using the ‘family case‐study’ method. This involved the in‐depth study of a small number of individuals in their family context, by means of intensive repeated interviewing about their TV viewing and their life‐style more generally. The conducted case‐studies provided many insights of the role and significance of television within different styles of life and pointed to a number of practical implications for broadcasters, concerning both programme‐making and programme‐planning. 相似文献
7.
In response to extensive research exposing students' poor understanding of the particle theory of matter, this article argues that the conceptual framework within which the theory is introduced could be a limiting factor. The standard school particle model is characterized as operating within a “solids, liquids, and gases” framework. Drawing on an analysis of scientific ideas on matter and research into students' understanding, issues arising from the framework are identified which could contribute towards students' well known difficulties. The analysis leads to the proposal for a particle model based within the framework of the concept of a substance. Results from two exploratory studies using the substance‐based particle model with children (ages 9–10) in two contrasting elementary schools in England are then reported. After a short teaching intervention with a class in each school, individual interviews were held with a sample of 12 students from each class. Data were collected on students' understanding of substances coexisting in different room temperature states and phenomena involving changes of state and mixing. The results gave useful feedback on the specification of the model and its teaching. Overall the students' engagement with the particle ideas was encouraging and suggests a larger scale testing of the substance‐based model is merited. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 47:130–150, 2010 相似文献
8.
Nicos Valanides Maria Papageorgiou Charoula Angeli 《Journal of Science Education and Technology》2014,23(1):26-36
The study provides evidence concerning elementary school children’s ability to conduct a scientific investigation. Two hundred and fifty sixth-grade students and 248 fourth-grade students were administered a test, and based on their performance, they were classified into high-ability and low-ability students. The sample of this study was randomly selected and included 80 students, 40 fourth-grade and 40 sixth-grade students of low and high abilities. Students were specifically instructed to investigate the functioning of a device, to think aloud prior and after any experiment with the device, and to keep a record of their experimental results. The results showed that students were inclined to mainly collect evidence from the experimental space and failed to control variables during their investigation. The majority of the students had difficulties with effectively organizing collected data and failed to coordinate hypotheses with evidence. The significant interaction effect that was found between grade level and ability in terms of students’ investigation ability indicates that the existing gap between high- and low-ability students becomes bigger as students become older. Undoubtedly, ongoing research efforts for identifying patterns of children’s cognitive development will be most valuable as they can have important implications for the design of teaching scenarios and inquiry-based science activities conducive to accelerating students’ cognitive growth and scientific investigation abilities. 相似文献
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10.
George Papageorgiou Maria Grammaticopoulou Phil Michael Johnson 《International Journal of Science Education》2013,35(12):1647-1664
Thirty‐six pupils from three sixth‐grade classes (ages 11/12, n = 75) in Greece were interviewed pre‐ and post‐intervention in a piece of research on explanations of chemical phenomena. Software concerning chemical phenomena was incorporated in a teaching scheme, where the particle theory was used. After a 13 hour intervention, pupils’ explanations were categorized in five discrete categories. Only a few pupils could give satisfactory explanations, involving the integration of particle ideas at the level of atoms. The idea of chemical change seemed to be very difficult for the majority of pupils. Implications for the teaching of chemical phenomena at young ages are discussed. 相似文献