Error diagnosis in problem solving environment using action-object-input scheme

Abstract

In T-algebra problem solving environment students solve expression manipulation problems step-by-step using transformation rules and following the three stage input dialogue. The errors can be made either when selecting the rule or the objects of the rule or while inputting the resulting expression. The program is able to diagnose different errors and help to correct them. This paper gives an overview of the error diagnosis principle that is used in the T-algebra. © Springer-Verlag Berlin Heidelberg 2006.