Sena Gencan successfully defended her thesis titled “Comparison of Parameters and Classification Accuracy of DINA, DINO, HO-DINA and HO-DINO Cognitive Diagnostic Models” under the supervision of Prof. Dr. Şeref Tan, in the thesis committee consisted of Prof. Dr. Hakan Yavuz Atar, Prof. Dr. Dilara Bakan Kalaycıoğlu, Prof. Dr. Selahattin Gelbal and Prof. Dr. Nuri Doğan, and received the title of Doctor. We congratulate our friend and wish her continued success.