Error diagnosis in a tutoring system for the conjugation and spelling of Dutch verbs

摘要

A flexible knowledge-based tutoring system for the conjugation and spelling of Dutch verbs is described. The program, called Het Spelraam, is intended to communicate procedural knowledge about the spelling of verb forms to students with elementary spelling knowledge. The student has to fill in gapped sentences. If an incorrect answer is entered, the system locates the point where the student deviated from the path through the spelling algorithm that is leading to the correct answer. From that particular point the student is guided through the spelling algorithm. The error diagnosis techniques applied are described in detail. Het Spelraam is a commercial product which is used in both schools and language-training institutes. Results from initial evaluations are promising.