The CoDIS Taxonomy for Brain-Computer Interface Games Controlled by Electroencephalography

Abstract

Brain-computer interfaces (BCI) are systems able to respond to a user’s intent based on physiological information acquired directly from his/her brain. BCI-based games employ those physiological data to control or alter the game world, providing not only the possibility of greater immersion for the player, but also allowing virtually any person, regardless of physical disabilities, to play the game, allowing many research possibilities for the field of Human-Computer Interaction (HCI). However, being an interdisciplinary field, research with BCI-based games is often conducted by researchers from different areas, making it difficult to organize and compare studies involving those games. In this context, this article presents a model-based taxonomy for games controlled by electroencephalography (EEG), a specific case of non-invasive modality for BCI systems. The taxonomy, called CoDIS, was constructed after surveying the literature and considering four aspects of EEG-controlled games, i.e., Concept, Design, Implementation and Study, each with different dimensions and attributes to represent a total of 48 characteristics of such games. Each of these dimensions was then described considering the current state of the field, and the usefulness of the taxonomy was demonstrated based on examples from the literature. The taxonomy may be used by researchers, designers and developers to classify, identify, implement and compare EEG-based games based on the dimensions of the taxonomy.