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