Developing a serious game for enhancing student problem-solving: a three-layers effectiveness model. - Razieh Mohaqeqian Yaqoubi; Morteza RezaeiZadeh; Mojtaba Vahidi-Asl; Darya Ramezani; Sarvin Mohammadi; Erfan Rafiei Oskouei (Entertain. Comput., 2026)