Analytical and fuzzy Student and Document Modeling for Adaptive Educational Hypermedia System

CAMELEON is the English acronym of Computer Adaptive Medium for LEarning On Networks, It’s a system running across the Internet / Intranet, allowing teacher introduce his/her course and helping the learner to study it (presentation of the course materiel, assessments, etc.) via an adaptive hypermedia interface. We discuss in this paper the tutoring part and more precisely how the system model student and document. Adaptive hypermedia is usually related to user or student model and so we generally display pages depending on this user model. In our system we take into account two parameters: level of knowledge and the learning style preferred by this student based on the FELDER learning style model. We associate a matrix to each document, the matrix is composed of related signatures to elementary document fragments, and student profiles are modeled via a matrix composed by different values of learning styles and level of knowledge. Each entry in the matrices is a probability and so we use fuzzy logic to maintain and update the student model.