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Communication Dans Un Congrès Année : 2019

Prospective mathematics teachers’ extrapolative reasoning about misleading bar graphs

Samet Okumus
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  • PersonId : 1040343
Ercan Dede
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  • PersonId : 1062657

Résumé

This study investigates prospective mathematics teachers’ (PSTs) reasoning about magnitudes in misleading bar graphs. We report results from three student teachers who worked in a group. They made sense of vertically-oriented bar graphs whose vertical axis was not equi-spaced or y-axis did not start with zero. We analyze PSTs’ extrapolative reasoning that refers to the ways they identified implicit relationships in graphs. The results demonstrated that PSTs modified or re-produced the bar graphs to overcome the misleading information, and re-labeled the numerical values of the categorical variables. They focused on arithmetic calculations and used them as a checking tool when they modified the bar graphs. They changed the location of the zero baseline and tended to keep the lengths of the bars invariant.
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Dates et versions

hal-02435306 , version 1 (10-01-2020)

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  • HAL Id : hal-02435306 , version 1

Citer

Samet Okumus, Ercan Dede. Prospective mathematics teachers’ extrapolative reasoning about misleading bar graphs. Eleventh Congress of the European Society for Research in Mathematics Education, Utrecht University, Feb 2019, Utrecht, Netherlands. ⟨hal-02435306⟩

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