Os Princípios Invariantes da Noção de Medida Investigados a partir da Perspectiva de Sentido Numérico

Abstract

This study investigates children's knowledge about measurements based on the idea of invariants principles, and of number sense. Forty children (6 and 8 years old) made judgments about situations involving measurements of volume, mass, distance and length. Task 1 examined the ability to identify the appropriate unit to measure different magnitudes, and Task 2 the understanding of the inverse relation between the size of the unit and the number of units needed to measure a magnitude of an object. Results showed that children have a sense of measurement and that this sense does not manifest itself equally in relation to different magnitudes. Also, children showed a better understanding about the inverse relation between the size of the unit and the number of units than of the relation between unit and the magnitude of the object to be measured.