Although student covariation reasoning has been explored in depth to improve understanding of the correspondence between variables, research has focused on studying existing reasoning about variables in Cartesian representations. The working method had a qualitative approach, with a descriptive exploratory scope, the spontaneous representations…

Adapts a metaphor to draw attention to four aspects of the relationship between originator and user, and the communication medium: the problem of encoding information in graphic form, diagrams as tools for enquiry and thought, illustrations as aids to learning, and illustrations as aids to problem solving. (Author)

This research compared the performance of ninth grade females and males on flight protocol, with particular attention to interpretation of the graphs of paths of falling bodies, rolling objects, and projectiles. These subjects were chosen because they had received no formal instruction in projectile motion, yet through typical life experience, had…