Exploring the relationship between physics-related epistemological beliefs and physics understanding

Three studies are reported that investigated the relationship between secondary school students’ physics-related epistemological beliefs and physics conceptual understanding. Study 1 involved the development of a Greek Epistemological Beliefs Evaluation Instrument for Physics (GEBEP) which was administered to 394 students (10th graders). Study 2 investigated the hypothesis that physics epistemological sophistication as measured by the GEBEP is a good predictor of physics understanding. The participants were selected from the 394 students who participated in Study 1. More specifically we selected the 10% (38) students with the highest scores in the GEBEP (high epistemological sophistication group, HES) and the 10% (38) students with the lowest GEBEP scores (low epistemological sophistication group, LES) and measured their understanding of Newton’s three laws using the Force and Motion Conceptual Evaluation instrument (FMCE) developed by Thornton and Sokoloff (1998). The results showed that the HES group had significantly higher scores in the FMCE than the LES group. Regression analysis showed that beliefs regarding the Construction and Stability of physics knowledge and the Structure of physics knowledge were good predictors of physics understanding. Study 3 re-examined the same hypothesis on a new independent sample of students. The results based on the entire sample, showed again that beliefs regarding the Construction and Stability of physics knowledge predicted physics understanding. Overall, the results suggest that sophisticated physics-related epistemological beliefs are necessary but not sufficient for physics understanding and point to the importance of taking them into consideration in physics education.     

What do Children Aged Four to Seven Know about the Digestive System and the Respiratory System of the Human Being and of Other Animals?

The object of this paper is to learn what little children know about the inside of their bodies before they have studied these particular aspects at school. The data for our project were collected by means of drawings made by 342 Spanish children aged four to seven. They were required to depict where the food, drink, and air which enter their bodies go. In addition to this, we intend to study how the ideas of children evolve during three consecutive years. For this purpose, a group of 32 subjects was monitored. Our findings show that the children recognise specific organs in their own bodies which they associate with the intake of food and air. Furthermore, they usually extrapolate those organs to other animals they are familiar with. Their ideas about the digestive system are more adequate than the ones about the respiratory system, though their ideas improve as they become older, above all those concerning the digestive system. Taking these findings as a basis, this paper suggests some points to be taken into consideration for teaching purposes.     

Students’ Ideas about How and Why Chemical Reactions Happen: Mapping the conceptual landscape

Research in science education has revealed that many students struggle to understand chemical reactions. Improving teaching and learning about chemical processes demands that we develop a clearer understanding of student reasoning in this area and of how this reasoning evolves with training in the domain. Thus, we have carried out a qualitative study to explore students reasoning about chemical causality and mechanism. Study participants included individuals at different educational levels, from college to graduate school. We identified diverse conceptual modes expressed by students when engaged in the analysis of different types of reactions. Main findings indicate that student reasoning about chemical reactions is influenced by the nature of the process. More advanced students tended to express conceptual modes that were more normative and had more explanatory power, but major conceptual difficulties persisted in their reasoning. The results of our study are relevant to educators interested in conceptual development, learning progressions, and assessment.     

Environmental engineering education (E3) in the Gulf Co-operation Countries

The six members of the Gulf Co-operation Countries (GCC)—Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the United Arab Emirates—are facing enormous environmental challenges associated with rapid urbanisation and industrialisation, especially in the last three decades, due to its role as a global hydrocarbon energy centre. None of these countries have systematic and specialised academic programmes with the sole purpose of Environmental Engineering Education (E3). The current status of E3 in the universities across the region is surveyed and thus the individual and collective higher education policies towards environmental affairs are highlighted. The E3 policies of the regional universities are then compared to the benchmark status of the European and the US universities. The ABET criteria are used to evaluate non-E3 programs. The survey shows that the environmental engineering subjects were mostly taught under the umbrella of civil or chemical engineering departments in the GCC countries. An educational scheme for E3 in the GCC higher education institutes is proposed that is based on the evolution of E3 approach in the Western universities.     

Simulation games in science education‡

The astronomy concepts of 345 young people were studied over a 10‐year period using a multi‐media, multi‐modal methodology in a research design where survey participants were interviewed three times and control subjects were interviewed twice. The purpose of the research was to search for evidence to clarify competing theories on conceptual coherence versus knowledge‐in‐pieces, distinguishing between coherence as revealed in the representational systems at any particular stage in a young person’s development and the changes evident in mental growth thereafter. Thus five research questions concerned with the elements and structure of understanding were investigated: (1) conceptual coherence shown as patterns of high correlation of concept representations between the media used to assess subjects’ understanding within a survey, as well as (2) coherence revealed as consistency of representation of those concepts across media and modalities; (3) enhanced conceptual understanding and skill through repeated interviews across (longitudinal) surveys, as young people develop their knowledge; (4) cultural similarity in subjects’ representations of basic static concepts (e.g. the shape of the Earth); and (5) improved understanding of basic dynamic concepts (e.g. the motion of the Earth) and complex dynamic concepts (e.g. seasons and eclipses), through “knowledge‐skill compounding”. The research findings supported conceptual coherence and rejected the counter argument of knowledge‐in‐pieces (at an alpha level of .05). Further research is recommended to replicate current research in cultures other than those of China and New Zealand studied here to confirm the view that cognition and knowledge are inherently coherent in young people.     

Arguing from Nature: The role of ‘nature’ in students’ argumentations on a socio-scientific issue

This paper explores how students invoked different conceptions of ‘nature’ in eight socio-scientific group discussions about human gene therapy. The paper illustrates and discusses how the students articulated nature and to what extent they elicited science factual content in the process. While the students in this study invoked nature at key places in a variety of dialectical contexts in the discussions, these invocations were often uncritical appeals and rarely involved science factual content. Even when an argument from nature was challenged, the author of that argument would often shift the sense of nature rather than elaborate upon the argumentation. It is argued that if students were properly introduced to the evaluative character of the term ‘nature’ it would not just be conducive to the quality of their argumentation, but also invite them to foreground science factual content at key places in their discussion.