Abstract
This article deals with the interpretation of motion Cartesian graphs by Grade 8 students. Drawing on a sociocultural theoretical framework, it pays attention to the discursive and semiotic process through which the students attempt to make sense of graphs. The students’ interpretative processes are investigated through the theoretical construct of knowledge objectification and the configuration of mathematical signs, gestures, and words they resort to in order to achieve higher levels of conceptualization. Fine-grained video and discourse analyses offer an overview of the manner in which the students’ interpretations evolve into more condensed versions through the effect of what is called in the article “semiotic contractions” and “iconic orchestrations.”
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Notes
The research team included Mélanie André, Serge Demers, Alain Girouard, Isaias Miranda, Andrew Sanderson, and Sonia Gonçalves .
By utterance I do not mean something necessarily verbal. As Nemirovsky and Ferrara (2009) cogently argue, utterances can also incorporate actions, gestures and other sensorial elements.
“[T]he written sign is very frequently simply a fixed gesture” (Vygotsky 1997, p. 133).
I have been using the term orchestration in the manner of Bakhtin (1981).
For other examples of the role of iconicity and contraction in objectifying processes, see Radford (2008d).
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This article is a result of a research program funded by The Social Sciences and Humanities Research Council of Canada/Le Conseil de recherches en sciences humaines du Canada (SSHRC/CRSH).
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Radford, L. “No! He starts walking backwards!”: interpreting motion graphs and the question of space, place and distance. ZDM Mathematics Education 41, 467–480 (2009). https://doi.org/10.1007/s11858-009-0173-9
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DOI: https://doi.org/10.1007/s11858-009-0173-9