Girnat, Boris
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Girnat, Boris
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- PublikationTwo Cognitive Diagnosis Models to Classifiy Pupils’ Algebraic Skills in Lower Secondary Schools(PME, 2017) Girnat, Boris; Kaur, Berinderjeet; Ho, Weng Kin; Toh, Tin Lam; Choy, Ban Heng [in: Proceedings of the 41st Conference of the International Group for the Psychology of Mathematics Education]Cognitive diagnosis models (CDMs) are a relatively new technique to analyse pupils’ competencies. Two CDMs are presented to describe pupils’ algebraic skills: a stage model to locate a pupil’s skill profile on the steps from proto-algebraic thinking to formal algebra and a model to distinguish the use of different aspects of variables. The results are from a representative study with 636 participants in grade 8 and 9, indicating that both CDMs are empirically applicable and leading to some substantial results: Practically no gender differences are detectible; only 63.7% of the pupils reach the formal level of algebra; the learning effects are mainly located in syntactical skills; learning effects related to other aspects of variables (like inserting values or references to objects and real-world situations) remain in the background.04B - Beitrag Konferenzschrift