Diseño de un cuestionario de diagnóstico acerca del manejo del concepto de variable en el álgebra

Resumen

This paper reports the first stage ofa project investigating college novice students’ interpretations and uses of different realisations of the concept of variable, namely: as unknown, as general number, in functional relationships.

In particular, we present and discuss the reliability of a questionnaire that aimed at providing a first students’ profile concerning their interpretations and uses of variable. Finally, initial results obtained by analysing students’ responses are outlined.