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Download full textMisailadou, Christina; Williams, Julian – International Group for the Psychology of Mathematics Education, 2003
We report a study of 10-14 year old children's use of additive strategies while solving ratio and proportion tasks. Rasch methodology was used to develop a diagnostic instrument that reveals children's misconceptions. Two versions of this instrument, one with "models" thought to facilitate proportional reasoning and one without were…
Descriptors: Mathematical Concepts, Methods, Inferences, Misconceptions
