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Item Impact of Non-Player Characters on the Gaming Experience: Simulation Game vs. Competitive Exergame(The Eurographics Association, 2025) Miranda, Nadia Montaña; Chover, Miguel; Argudo, Oscar; Iparraguirre, OlatzNon-player characters (NPCs) play a crucial role in the gaming experience and should be designed to suit the characteristics of each game genre. This study examines the impact of AI-driven NPCs on player experience by comparing their impact in a hospital management simulation game and in a competitive exergame called Fitoon. In the simulation game, a needs-based AI system was implemented, where agents autonomously make decisions based on their internal states, such as hunger or stress. In Fitoon, machine learning techniques, including reinforcement and imitation learning, were applied to train agents capable of competing against players in obstacle races. Through user testing utilizing the In-Game version of the Game Experience Questionnaire, this study examines how the presence of these NPCs influences the players' perception of the gaming experience in both contexts. The results indicate that while NPCs in the simulation game have a greater impact on reducing feelings of tedium and boredom, in the exergame, they significantly increase the sense of challenge.Item Brain Car: Un videojuego controlado por actividad cerebral para gestionar el estrés(The Eurographics Association, 2025) Tonda, A.; Fuentes-Matutano, R.; Gómez-Cambronero, Á.; Remolar, Inmaculada; Argudo, Oscar; Iparraguirre, OlatzLa ansiedad es un problema mundial para el que el 75% de las personas no recibe tratamiento. Con el fin de ayudar a la prevención de este trastorno, se ha desarrollado un videojuego de conducción que pretende reducir el estrés entrenando la concentración. El juego consta de dos niveles en los que la velocidad máxima de un coche depende de la concentración del usuario. El primero implementa un modelo de control absoluto en trayectoria predefinida; y el segundo, un modelo híbrido en entorno de exploración tridimensional. El videojuego ha sido evaluado a través de un estudio piloto con 20 participantes, cuyos resultados han destacado el impacto positivo del entrenamiento atencional a través del videojuego en la reducción del estrés.