Analysis of physiological responses to a social situation in an immersive virtual environment
Presence: Teleoperators and Virtual Environments - Special issue: 8th annual international workshop on presence II
Presence: Teleoperators and Virtual Environments
Presence: Teleoperators and Virtual Environments
Transcranial Doppler: A Tool for Augmented Cognition in Virtual Environments
FAC '09 Proceedings of the 5th International Conference on Foundations of Augmented Cognition. Neuroergonomics and Operational Neuroscience: Held as Part of HCI International 2009
Virtual Reality - Special Issue on Presence
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Transcranial Doppler monitoring (TCD) has been proposed as a tool to be used in Augmented Cognition (AugCog) systems to monitor brain activation during the performance of different cognitive tasks. In the present study, the main goal is to analyze variations in blood flow velocity (BFV) measured by TCD during the exposure to a virtual reality environment when there are changes in the focus of attention of the participants. Two abrupt events are forced during the navigation in a virtual environment in order to change their focus of attention to the real world. In one of them, the screen goes completely blue, and in the other one, a mesh appears in front of the virtual environment making it difficult to visualize. Results show that BFV values in both middle cerebral arteries remain similar when the first event occurs, but there is an increase during the second event. The origin of this increment may probably be found in the higher difficulty of having a mesh in front of the virtual environment, requiring more attention than before. These results show that changes in the stimuli can generate modifications in BFV that can be monitored by TCD, and can be useful for AugCog applications.