Fuzzy user modeling for adaptation in educational hypermedia

Education is a dominating application area for adaptive hypermedia. Web-based adaptive educational systems incorporate complex intelligent tutoring techniques, which enable the system to recognize an individual user and their needs, and consequently adapt the instructional sequence. The personalization is done through the user model, which collects information about the user. Since the description of user knowledge and features also involves imprecision and vagueness, a user model has to be designed that is able to deal with this uncertainty. This paper presents a way of describing the uncertainty of user knowledge, which is used for user knowledge modeling in an adaptive educational system. The system builds on the concept domain model. A fuzzy user model is proposed to deal with vagueness in the user's knowledge description. The model uses fuzzy sets for knowledge representation and linguistic rules for model updating. The data from the fuzzy user model form the basis for the system adaptation, which implements various navigation support techniques. The evaluation of the presented educational system has shown that the system and its adaptation techniques provide a valuable, easy-to-use tool, which positively affects user knowledge acquisition and, therefore, leads to better learning results.

[1]  Paul De Bra,et al.  Adaptive educational hypermedia on the web , 2002, CACM.

[2]  Nicola Henze,et al.  Adaptive hyperbooks: adaptation for project-based learning resources , 2000 .

[3]  Mary Campione,et al.  The Java Tutorial: A Short Course on the Basics , 2006 .

[4]  Peter Brusilovsky,et al.  Adaptive Hypermedia: An Attempt to Analyze and Generalize , 1996, MHVR.

[5]  John Gaschnig,et al.  MODEL DESIGN IN THE PROSPECTOR CONSULTANT SYSTEM FOR MINERAL EXPLORATION , 1981 .

[6]  David N. Chin.  KNOME: Modeling What the User Knows in UC , 1989 .

[7]  Cristina Conati,et al.  POLA: a student modeling framework for Probabilistic On-Line Assessment of problem solving performance , 2001 .

[8]  George J. Klir,et al.  Fuzzy sets, uncertainty and information , 1988 .

[9]  Peter Brusilovsky,et al.  From adaptive hypermedia to the adaptive web , 2002, CACM.

[10]  Leslie J. Briggs,et al.  Principles of Instructional Design , 1974 .

[11]  Peter Brusilovsky,et al.  ELM-ART: An Adaptive Versatile System for Web-based Instruction , 2001 .

[12]  Peter Brusilovsky,et al.  Adaptive Hypermedia , 2001, User Modeling and User-Adapted Interaction.

[13]  Mark David Mann.  Using the adaptive navigation support technique of link hiding in an educational hypermedia system: An experimental study , 1999 .

[14]  Mark S. Schlager,et al.  Representing a Student's Learning States and Transitions , 1995 .

[15]  Robert Ubell.  Engineers turn to e-learning , 2000 .

[16]  Cristina Conati,et al.  Procedural Help in Andes: Generating Hints Using a Bayesian Network Student Model , 1998, AAAI/IAAI.

[17]  Judi R. Thomson,et al.  Generating Individualized Hypermedia Applications , 2002 .

[18]  Etienne Wenger,et al.  Artificial Intelligence and Tutoring Systems: Computational and Cognitive Approaches to the Communication of Knowledge , 1987 .

[19]  Sandra Katz,et al.  Modeling the Student in Sherlock II , 1992 .

[20]  Piet Kommers,et al.  Hypermedia Learning Environments: Instructional Design and Integration , 1996 .

[21]  Joel D. Martin,et al.  Student assessment using Bayesian nets , 1995, Int. J. Hum. Comput. Stud..

[22]  Eelco Herder.  Utility-Based Evaluation of Adaptive Systems , 2003 .

[23]  Edward H. Shortliffe,et al.  Computer-based medical consultations, MYCIN , 1976 .

[24]  Anthony Jameson,et al.  User-adaptive systems: An integrative overview , 1999 .

[25]  Robert J. Mislevy,et al.  The Role of Probability-Based Inference in an Intelligent Tutoring System. , 1995 .

[26]  Mathias Bauer.  A dempster-shafer approach to modeling agent preferences for plan recognition , 2005, User Modeling and User-Adapted Interaction.

[27]  Peter Brusilovsky,et al.  Methods and techniques of adaptive hypermedia , 1996, User Modeling and User-Adapted Interaction.