SIETTE: A Web–Based Tool for Adaptive Testing
Student assessment is a very important issue in educational settings. The goal of this
work is to develop a web-based tool to assist teachers and instructors in the assessment process.
Our system is called SIETTE, and its theoretical bases are Computer Adaptive Testing and Item
Response Theory. With SIETTE, teachers worldwide can define their tests, and their students can
take these tests on-line. The tests are generated according to teachers' specifications and are
adaptive, that is, the questions are selected intelligently to fit the student's level of knowledge. In
this way, we obtain more accurate estimations of student's knowledge with significantly shorter
tests. By using the computer, larger question databases can be stored, selection algorithms can be
performed efficiently, and questions can include multimedia content. The use of Java applets
allows the inclusion of executable content in question stem and/or answers, so the student can
interact with the system by means of this applet. In this way, new possibilities are added to
Computer Adaptive Tests, such as using traditional multiple-choice questions together with
questions whose answer is evaluated by the applet itself.