Daniela VillaniCatholic University of Milan and Istituto Auxologico ItalianoFrancesco RivaCatholic University of MilanGiuseppe RivaCatholic University of Milan and Istituto Auxologico ItalianoIn recent years, several publications have appeared on virtual reality (VR)therapyinthetreatmentofanxietydisorders.However,alimitednumberofthesestudies targeted stress management and relaxation. To evaluate the efÞcacy ofVR as a support tool in the relaxation process, this study compared its efÞcacywith two other media (DVD and audiotape). The goals of the experiment were totest the efÞcacy of each condition in increasing relaxation and reducing anxiety,and whether the sense of presenceNthe feeling of being inside the mediacontentNcorrelated with the efÞcacy of the treatment. Results suggested theimportance of the sense of presence as a mediating variable between the mediaexperience and the efÞcacy of the protocol.