Experimental set-up during the visuo-tactile stimulation periods and behavioural experimental design.

<p>(A) Design of the experimental blocks, containing three phases: pre-stimulation test (<i>pre-test</i>), visuo-tactile stimulation and post-stimulation test (<i>post-test</i>). (B) Experimental set-up during the visuo-tactile stimulation period. (C) Behavioural task. Panel C1 shows the staircase procedure followed in Experiment 1, in which two staircases containing morphed images between self and other and differing in their direction of change, were randomly interleaved. Images were presented one after the other, with a random interstimulus interval (ISI) ranging between 0.5 and 1.5 s. For each image participants judged whether the face depicted looked <i>“more like their own face”</i> or <i>“more like the other person’s face”</i>. Panel C2 shows the morphing procedure, the direction of morphing (from “self to other” or from “other to self”) displayed in the two types of movies used, and the participants’ task in Experiment 4.