Java web teknolojileri kullanılarak esnek bilgisayar tabanlı değerlendirme sistemi implementasyonu

In the scope of this thesis, a web based flexible computer based assessment system was developed using Java web technologies. The system is designed to be flexible in order to eliminate the problems of existing systems. After the deployment on a web server of the developed system, thirty electronic exams were applied to the Akdeniz University Engineering Faculty students. The questions and tests added by the instructors to the system are analyzed according to the principles of item-response theory. The results of these analyses are presented the instructor and feedback are given about the questions. Within the scope of this thesis, introduction to programming course was selected as a reference course and its question bank was examined. According to the analysis results, it was determined that some questions were inappropriate for asking and some questions need to be revised. Researchers have investigated in many studies, whether the use of computer based assessment system has a negative impact on the student's exam success. Although it is proved that the exams in which multiple-choice questions are asked in the electronic environment have no effect on the student's exam success, there are no studies for open-ended questions. In the scope of this thesis, Natural Science course was selected as a reference course. In 2017-2018 fall semester, exams of this course were held in the paper environment with the open-ended questions. In 2018-2019 fall semester, exams were held in the electronic environment with the open-ended questions. According to the independent student t-test analysis performed on the average exam scores, there was no significant difference between the two groups ($p$=0,441). The findings of the study revealed that the use of the electronic exam system did not have a negative effect on student's success in the exams which consisted of open-ended questions. Electronic exams are usually held in computer laboratories of schools. This laboratories are designed to teach courses. Because of this, it is not difficult for students to look at each other's screens. Although it is not always possible to make changes in the settlement of the computers, it is possible to detect the students who are copying by examining the similarities of the student's answers after the exams. In the exams conducted using the developed system, the methods of Jaccard and Cosine similarity analysis were used to detect the students who were copying. These two methods were compared in terms of the results. It has been seen that the use of Cosine similarity analysis method is more suitable than the Jaccard similarity analysis method for copy detection. As a results of all these studies, by using open source technologies, a computer based assessment system designed in accordance with the use of educational institutions and covering all measurement and evaluation processes is developed.