Movement Augmentation in Virtual Reality: Impact on Sense of Agency Measured by Subjective Responses and Electroencephalography

Virtual movement augmentation, which refers to the visual amplification of remapped movement, shows potential to be applied in motion-related virtual reality programs. Sense of agency (SoA), which measures the user's feeling of control in their action, has not been fully investigated for augmented movement. This study investigated the effect of augmented movement at three different levels (baseline, medium, and high) on users' SoA using both subjective responses and electroencephalography (EEG). Results show that SoA can be boosted slightly at medium augmentation level but drops at high level. The augmented virtual movement only helps to enhance SoA to a certain extent.