Audial engagement: Effects of game sound on learner engagement in digital game-based learning environments

Learner engagement has been considered to be an important factor for successful learning in multimedia learning environments, which include digital game-based learning (DGBL). Nonetheless, there have been few empirical studies and very little consensus on what elements critically affect learners' engagement in a DGBL environment. Audial and visual stimuli are often the only means to communicate learning materials to the learners because of the virtual environment found in DGBLs. This means that learners' engagement in DGBL will need to occur via audial or visual stimuli - sans other specialty devices to immerse players in virtual reality (such as Occulus Rifts and Virtusphere). Yet, very few researchers have directly measured the effect of sensory stimuli on learners' engagement during (game-based) learning. This study examined the effects of non-player characters' (NPC) voiceovers on play-learners' engagement in DGBL through a role-playing game (RPG). A randomized control-group post-test only design was used to collect data from 74 participants. Data analysis revealed that the participants who played the game with voiceovers were more engaged than participants who played without voiceovers. The results of this study will guide practitioners to identify more effective ways of adopting, developing, and modifying digital games for educational purposes.