Table 1.

Questionnaire items for measuring subjective aspects of the computer graphics (CG) hand in experiment 1.

Category	Questionnaire items
Ownership	I felt that the CG hand was my hand
	The felt position of the real hand was located on the CG hand
Ownership control	The real hand was drifting toward the CG hand
	The real hand was turning into a computer graphics
	It seemed that I had more than one right hand
Agency	The CG hand moved as if it was obeying my will
	I felt as if I was controlling the movements of the CG hand
Agency control	I felt as if the CG hand was controlling my will
	I could sense the movement from somewhere between my real hand and the CG hand
	It seemed as if the CG hand had a will of its own

Participants rated their level of agreement with each item on a 7-point scale, ranging from -3 (strongly disagree) to + 3 (strongly agree).