This study attempts to characterise what 7th- and 12th-grade students believe they do not know about artefacts and natural objects, as well as the dependence of what is unknown on a knowledge of these objects. The students were asked to make explicit through questioning what they did not know about a sample of objects. The unknowns generated were…

This study was designed to enhance our understanding of the changing relationship between low- and high-level writing processes in the course of development. A dual description of writing processes was undertaken, based on (a) the respective time courses of these processes, as assessed by an analysis of eye and pen movements, and (b) the semantic…