Table 1. Experimental conditions in the video experiment showing mirrored and non-mirrored forearms while scratching of the non-itching (left, S-) or the itching (right, S+) side.

Scratching non-itching (left) side (S-)	Scratching itching (right) side (S+)
a)Both arms are not mirrored	e) Both arms are not mirrored
→both arms are shown (unflipped)	→ both arms are shown (unflipped)
→scratching on the left arm visible [V-/+]	→ scratching on right arm visible [V+/-]
b)Both arms are mirrored	f) Both arms are mirrored
→both arms are shown (flipped)	→ both arms are shown (flipped)
→scratching visible on right arm [V+/-]	→ scratching on left arm visible [V-/+]
c) Only the left arm is mirrored	g) Only the left arm is mirrored
→ left arm is shown twice (flipped and non-flipped)	→ left arm is shown twice (flipped and non-flipped)
→ scratching of both arms visible [V+/+]	→ no scratching visible [V-/-]
d) Only the right arm is mirrored	h) Only the right arm is mirrored
→ right arm is shown twice (flipped and non-flipped)	→ right arm is shown twice (flipped and non-flipped)
→ no scratching visible [V-/-]	→ scratching of both arms visible [V+/+]