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Papageorgiou, George; Amariotakis, Vasilios; Spiliotopoulou, Vasiliki – Chemistry Education Research and Practice, 2017
The main objective of this work is to analyse the visual representations (VRs) of the microcosm depicted in nine Greek secondary chemistry school textbooks of the last three decades in order to construct a systemic network for their main conceptual framework and to evaluate the contribution of each one of the resulting categories to the network.…
Descriptors: Chemistry, Science Instruction, Textbooks, Textbook Content
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Zarkadis, Nikolaos; Papageorgiou, George; Stamovlasis, Dimitrios – Chemistry Education Research and Practice, 2017
Science education research has revealed a number of student mental models for atomic structure, among which, the one based on Bohr's model seems to be the most dominant. The aim of the current study is to investigate the coherence of these models when students apply them for the explanation of a variety of situations. For this purpose, a set of…
Descriptors: Cognitive Structures, Schemata (Cognition), Models, Nuclear Physics
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Papageorgiou, George; Markos, Angelos; Zarkadis, Nikolaos – Chemistry Education Research and Practice, 2016
The current study aims to investigate students' representations of the atomic structure in a number of student cohorts with specific characteristics concerning age, grade, class curriculum and some individual differences, such as formal reasoning and field dependence/independence. Two specific task contexts, which were designed in accordance with…
Descriptors: Science Instruction, Chemistry, Molecular Structure, Nuclear Energy
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Stamovlasis, Dimitrios; Papageorgiou, George; Tsitsipis, Georgios – Chemistry Education Research and Practice, 2013
Research in cognitive psychology and science education has acknowledged two antagonistic theoretical perspectives concerning students' knowledge. One perspective considers students' knowledge as coherent or theory-like, explaining the learning process in terms of framework theories and stable mental models, whereas the other considers it…
Descriptors: Hypothesis Testing, Scientific Concepts, Cognitive Psychology, Cognitive Ability
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Stamovlasis, Dimitrios; Tsitsipis, Georgios; Papageorgiou, George – Chemistry Education Research and Practice, 2012
In this study, structural equation modeling (SEM) is applied to an instrument assessing students' understanding of the particulate nature of matter, the collective properties and physical changes, such as melting, evaporation, boiling and condensation. The structural relationships among particular groups of items were investigated. In addition,…
Descriptors: Structural Equation Models, Student Evaluation, Scientific Concepts, Chemistry