... Compared to the VR and desktop/2D environments, a higher level of happiness [134], surprise [134], pleasantness [98], relief and positive influence [135], presence [136], skin conductivity [134], and HR [134] and was revealed. Interested readers can refer to following literature for more details, that have investigated discrete representation of emotions using VR [20], [21], [22], [26], [27], [58], [60], [69], [71], [73], [79], [80], [83], [84], [98], [99], [100], [101], [103], [105], [110], [112], [115], [127], [129], [130], [132], [133], [134], [135], [136], [137], [138], [139], [140], [141], [142], [143], [144], [145], [146], [147], [148], [149], [150], [151], [152], [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163], [164], [165], [166], [167], [168], [169], [170], [171], [172], [173], [174], [175], [176], [177], [178], [179]. ...