e-learning, test, expert system, student, evaluation, hierarchical system, Takagi-Sugeno expert system

The article deals with a hierarchical system and an approach for evaluating tests in e-learning systems using an expert system. Tests in e-learning system can be created in various modifications. In the proposed approach, the test in e-learning system is divided into categories of questions which represent the set of related questions. Then, we identify the criteria to evaluate questions and categories of questions. Then, we propose a hierarchical system to evaluate each question or a category of questions including continuous visualisation of the results. The hierarchical system uses an expert system for the evaluation. Based on visualised results, the creator of the test can recognise results for each question and the category of questions. The final evaluation of the e-learning test is also visualised and shown to the test creator. In the paper, individual steps of the proposed hierarchical systems are described. The proposed expert system is experimentally verified on test results of several students.