Figure 1.
The experimenter strokes the physical back of a female participant with a motion-tracked stick while she watches, on a head-mounted display, a virtual body (side view) from behind at a distance of 5 meters being synchronously stroked with a virtual stick. The subjects on the photograph have given written informed consent, as outlined in the PLOS consent form, to publication of the photograph.
Figure 2.
View of the virtual body and of the questionnaire.
(A) The view of the male participants when watching the virtual body. (B) The view of the questionnaire (for better visibility, the VAS and the fonts are scaled up) as it was presented on the head-mounted display. (C) The view of the female participants when watching the virtual body.
Table 1.
Self-report statements used for the assessment of conscious full-body self-perception.
Figure 3.
Scree-plot of the normalized raw stress.
Figure 4.
Two-dimensional common space map of the multidimensional scaling of the questionnaire responses in the first study.
The numbers indicate the self-report statements shown in Table 1. The symbols indicate that there are three groups of self-report statements: items referring to the experience of self-identification with the virtual body (dots); items referring to the experience of agency (triangles); and items referring to the experience of spatial presence (squares). Normalized raw stress = 0.026.
Figure 5.
Tree diagram of the cluster analysis (ICLUST).
The questionnaire items shown in Table 1 are indicated by numbers within rectangles. There are three higher-order clusters: C17 = bodily self-identification; C18 = agency; and C20 = spatial presence. Cluster fit = 0.79.
Figure 6.
Scree-plot of the eigenvalues.
Table 2.
Result of the MAP test.
Table 3.
Result of the principle components analysis of the responses to the 27 self-report statements on conscious full-body self-perception.
Figure 7.
Three-dimensional plot of the loadings of the questionnaire items on the components extracted by the principle components analysis in the second study.
The numbers indicate the self-report statements shown in Table 1. The components extracted by the principle components analysis are spanned by a cluster of items referring to the experience of self-identification with the virtual body (component 1), a cluster of items referring to the experience of spatial presence (component 2), and a cluster of items referring to the experience of agency (component 3).