List of Articles Intelligent Tutoring System Open Access Article Abstract Page Full-Text 1 - Intelligent (Language) Tutoring Systems: A Second-order Meta-analytic Review Hossein Heidari Tabrizi Mahmoud Jafarie Open Access Article Abstract Page Full-Text 2 - Enhancing Adaptive Learning Systems: A Probabilistic Approach Using Bayesian Networks and User Clustering Parvaneh Ahmadifar Mojtaba Salehi Mohammad Yarahmadi Morteza Zakeri