Table 2.

Questionnaire for sense of ownership (SoO) and sense of agency (SoA) evaluation.

Phenomenal Target Property	Statement
Sense of ownership	I felt like I was looking at my own hand.
	I felt like the artificial hand was part of my body.
	It seemed as if I were sensing the movement of my finger in the location where the artificial finger moved.
	I felt as if the rubber hand were my hand.
Sense of ownership (control questions)	It appeared as if the artificial hand were drifting toward my real hand.
	It felt as if I no longer had a right hand, as if my right hand disappeared.
Sense of agency	The artificial hand moved just like I wanted it to, as if it were obeying my will.
	Whenever I moved my finger, I expected the artificial finger to move in the same way.
	I felt as if I were causing the movement that I saw.
	I felt as if I were controlling the movements of the artificial hand.
Sense of agency (control questions)	I felt as if the artificial hand were controlling my will.
	It seemed as if the rubber hand had a will on its own.

Four questions addressed each phenomenal target property. In addition, control questions were included that included illusion-related questions but did not capture specific phenomenology of SoO and SoA. The questions were read in counterbalanced order to the participants, and the participants rated their level of agreement on a 7-point Likert scale.