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Table1:ClassificationofRPC-XRstudiescitedinthisarticle. Itemsinboldaresimilartooursystem.TechnologyacronymsareAsymmetric(Asym.), Symmetric(Sym.),VirtualRealityHeadMountedDisplay(VR-HMD),andAugmentedRealityHeadMountedDisplay(AR-HMD).Environment RestitutionacronymsarePanoramas(Pano.),Dynamic(Dyn.)andStatic(Stat.).CommunicationCues:EyeTracking(ET),HandTracking(HT),and FieldofViewfrustum(FoV).Conditionsacronymsarenon-verbalcommunication(NVC),with(w.),andwithout(w.o.).MeasuresacronymsareTask CompletionTime(TcT),Iterations(Iter.),Preferences(Pref.),Observations(O.),Co-presence(Co-p.),Spatial-presence(Spa-p.),Social-presence (So-p.),CognitiveLoad(CL.)Cybersickness(CS.),Empathy(Emp.),Usability(U.),andQuality(Qual.).Thehomogeneityofdifferentpresence measuresisbasedondefinitionsprovidedbyLombardetal.[23].
