Table 6.

Comparison of average values and t-tests for each question in the subjective questionnaire.

No.	Contents of question	Average value (main experiment)	Average value (control experiment)	Difference in means	p-value (two-sided t-test)
Q1	Because it looks like a four-fingered hand, I realize that I don't have a thumb	0.61	−0.45	1.06	0.006
Q2	I feel that my thumb doesn't exist	0.06	−0.84	0.90	0.027
Q3	Being able to see the middle finger has nothing to do with being able to see the other fingers	0.23	0.77	−0.55	0.071
Q4	I feel that the index finger does not exist	−2.10	−2.58	0.48	0.053
Q5	Seeing the ring finger is sufficient to notice the existence of the ring finger	0.65	1.13	−0.48	0.047
Q6	Fingers other than the visible index finger are independent of seeing the index finger	0.58	0.94	−0.35	0.152
Q7	The existence of the little finger is noticed only by seeing the little finger	1.32	1.13	0.19	0.837
Q8	I can see my thumb	−2.74	−2.45	−0.29	0.095