عنوان مقاله [English]
The purpose of this research was to design, develop, execute and evaluate an educational computer game named Cepheus based on DODDEL instructional design model to teach Optics concepts to sixth grade students. In addition to producing the game, the model was also evaluated. This research was performed by qualitative approach and formative research methodology with model evaluation. The research included four groups of participants: a group of field experts, computer game design experts, educational design experts, and the end users. The data of this study were collected using observation, semi-structured interviews and reviewing the model's documentations. Analyzing the qualitative data shows despite of many barriers and constraints on the production of this game, this prototype has fairly managed to meet the principles of computer game design and educational computer-based learning approach. Analyzing the findings also shows the strengths and weaknesses of each step of the model and In order to improve the model, the researchers suggested that the process of this model be transformed from a linear to nonlinear schema, the components of the need assessment and marketing of the final product at the stage of analysis of the situation and how and when the evaluation of educational concepts in the game, and the guidance system of the game in the design documentary stage be included.