Table 1. List of the 8 statements presented after both the synchronous and asynchronous Interpersonal Multisensory Stimulation (IMS). The questionnaire (adapted by Sforza et al., 2010) included eight statements. The first 3 questions capture the experience of the illusion by measuring: subjective experience of referred sensation (statements 1 and statement 2) and sense of facial ownership (statement 3). Participants were asked to reply to each of the statements using a Visual Analogue Scale (VAS) ranging from 0 (= “completely false”) to 12 (= “completely true”).

List of the statements
1.	It seemed as if I was feeling the touch of the paintbrush in the location where I saw the other's face touched.
2.	It seemed as if the touch I felt was caused by the paintbrush touching the other's face.
3.	I felt as if the other's face was my face.
4.	It felt as if my face was drifting toward the other's face.
5.	It seemed as if I might have more than one face.
6.	It seemed as if the touch I was feeling came from somewhere between my own face and the other's face.
7.	It appeared as if the other's face was drifting toward my own face.
8.	The other's face began to resemble to my own face, in terms of shape, skin tone, or some other visual features.