Browsing by Author "Gagatsis, Athanasios"
Now showing items 41-60 of 117
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Article
The effects of different modes of representation on the solution of one-step additive problems
Elia, Iliada; Gagatsis, Athanasios; Demetriou, Andreas P. (2007)This study investigated the role of different modes of representation, i.e., verbal description, decorative pictures, informational pictures and number line, in solving additive change problems. Data were collected from ...
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Article
An empirical four-dimensional model for the understanding of function
Gagatsis, Athanasios; Elia, Iliada; Panaoura, Areti; Gravvani, Katerina; Spyrou, Panayiotis (2006)Based on a synthesis of the relevant literature, this study explores students’ abilities in four aspects of the understanding of function: problem solving, concept definition, examples of function, recognizing functions ...
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Article
Errors in mathematics: a multidimensional approach
Gagatsis, Athanasios; Christou, Constantinos (Centre for Experimental Educational Research, 1997)La présente étude a un double objectif: d'une part le développement d'une approche théorique des erreurs d'élèves en mathématiques, d'autre part l'investigation des perceptions des enseignants sur le concept de l'erreur. ...
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Article
Estructura y niveles de habilidad en estudiantes de escuela primaria sobre geometría transformacional
Xistouri, Xenia; Pitta-Pantazi, Demetra; Gagatsis, Athanasios (2014)This paper used CFA analyses to investigate the factors and structure of transformational geometry concepts ability. The results suggest that the three geometric transformations (translation, reflection and rotation) consist ...
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Book
Evaluation multimensionelle de l' activité de lecture
Duval, Raymond; Gagatsis, Athanasios; Pluvinage, François (IREM - Université Louis Pasteur (University publication), 1984)
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Article
Exploring a high achiever's and a low achiever's strategies and images in early number work
Pitta-Pantazi, Demetra; Gagatsis, Athanasios (2001)Curriculum development within mathematics is often grounded in the belief that all individuals pass through the same sequence of learning, albeit at different paces. There seems to be a general assumption that there is ...
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Article
Exploring different aspects of the understanding of function: Toward a four-facet model
Elia, Iliada; Panaoura, Areti; Gagatsis, Athanasios; Gravvani, Katerina; Spyrou, Panayiotis (2008)Based on a synthesis of the relevant literature, this study explored students’ display of behavior in four aspects of the understanding of function: effectiveness in solving a word problem, concept definition, examples of ...
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Article
Évaluation multidimensionnelle de l'activité de lecture. = Multidimensional evaluation of the reading activity
Duval, Raymond; Gagatsis, Athanasios; Pluvinage, François (Centre for Experimental Educational Research, 1987)Proposes that cloze test scores be distinguished according to knowledge of text content, understanding of syntactic or argumentative links, reader's familiarity with the native language, and visual detection of similar ...
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Book
Formative assessment in the teaching and learning of matematics in Cyprus
Gagatsis, Athanasios (University of Cyprus, 2016)
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Article
Fostering representational flexibility in the mathematical working space of rational numbers
Gagatsis, Athanasios; Deliyianni, Eleni; Elia, Iliada; Panaoura, Areti; Michael-Chrysanthou, Paraskevi (2016)The study focuses on the cognitive level of Mathematical Working Space (MWS) and the component of the epistemological level related to semiotic representations in two mathematical domains of rational numbers: fraction and ...
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Article
From the guest-editor
Gagatsis, Athanasios (Centre for Experimental Educational Research, 1998)
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Article
Geometric and algebraic approaches in the concept of "limit" and the impact of the "didactic contract"
Elia, Iliada; Gagatsis, Athanasios; Panaoura, Areti; Zachariades, Theodosis; Zoulinaki, Fotini (2009)The present study explores students’ abilities in conversions between geometric and algebraic representations, in problem- solving situations involving the concept of “limit” and the interrelation of these abilities with ...
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Article
Geometric and algebraic approaches in the concept of complex numbers
Panaoura, Areti; Elia, Iliada; Gagatsis, Athanasios; Giatilis, G. P. (2006)This study explores pupils’ performance and processes in tasks involving equations and inequalities of complex numbers requiring conversions from a geometric representation to an algebraic representation and conversions ...
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Article
The geometrical model of number line as a representation of equivalence and addition of fractions
Michaelidou, E.; Gagatsis, Athanasios (2005)Images et représentations géométriques sont utilisées dans l'enseignement des mathématiques en vue d'améliorer la compréhension (Gagatsis, & Patronis, 1990). La ligne des nombres est une représentation géométrique utilisée ...
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Article
The geometrical model of the number line in the teaching of whole number addition and subtraction
Shiakalli, Myria; Gagatsis, Athanasios (2005)La 'ligne des nombres' est régulièrement utilisée comme support didactique pour l'apprentissage de l'addition et de la soustraction des nombres entiers. Il n'existe cependant que peu de recherche empirique pour en justifier ...
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Book Chapter
Geometry Learning in the Early Years: Developing Understanding of Shapes and Space with a Focus on Visualization
Elia, Iliada; van den Heuvel-Panhuizen, Marja; Gagatsis, Athanasios (Springer, 2018)In this chapter, we address children’s geometry learning in the early years with a focus on visualization. We start the chapter with some background information about visualization in mathematics and geometry and its ...
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Article
Graph-based hydraulic vulnerability assessment of water distribution networks. 9th International Conference on Critical Information Infrastructures Security,CRITIS 2014
Fragiadakis, Michalis; Xanthos, S.; Eliades,Demetrios G.; Gagatsis, Athanasios; Christodoulou, S. E. (2016)Presented herein is a methodology for the seismic and hydraulic assessment of the reliability of water distribution networks (WDN) based on general seismic assessment standards, as per the American Lifelines Alliance (ALA) ...
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Book
Identifying and nurturing mathematically gifted students.
Pitta-Pantazi, Demetra; Kattou, Maria; Kontoyianni, Katerina; Cleanthous, Eleni; Christou, Constantinos; Gagatsis, Athanasios; Leikin, R.; Hershkovitz, S.; Guberman, R. (2011)
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Article
Improper proportional reasoning: A comparative study in high school
Kontoyianni, Katerina; Modestou, Modestina; Erodotou, M.; Ioannou, P.; Constantinides, Aristotle; Parisinos, M.; Gagatsis, Athanasios (2006)
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Article
An Insight to Students' Geometrical Figure Apprehension Through the Context of the Fundamental Educational Thought
Gagatsis, Athanasios; Michael-Chrysanthou, Paraskevi; Deliyianni, Eleni; Panaoura, Areti; Papagiannis, C. (2015)