Table 13.

Content validity of the dimension “Environmental influences”

		Relevance of the questions						Clarity of the questions						Meaningfulness of the answers						Completeness of the answers
No	Content of the items	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd	Number of experts	Number of ratings of 3 or 4	I-CVIa	pc b	k* c	Evaluationd
1	Surroundings	9	8	0.89	0.018	0.89	****	8	5	0.63	0.219	0.52	**	-	-	-	-	-
2	Lighting	10	9	0.90	0.010	0.90	****	10	7	0.70	0.117	0.66	***	10	8	0.80	0.044	0.79	****	10	5	0.50	0.246	0.34	*
3	Noises	10	9	0.90	0.010	0.90	****	10	8	0.80	0.044	0.79	****	10	8	0.80	0.044	0.79	****	10	7	0.70	0.117	0.66	***
4	Smells	10	7	0.70	0.117	0.66	***	10	8	0.80	0.044	0.79	****	9	6	0.67	0.164	0.60	***	9	7	0.78	0.070	0.76	****
5	Stimuli	10	8	0.80	0.044	0.79	****	10	7	0.70	0.117	0.66	***	7	5	0.71	0.164	0.66	***	10	8	0.80	0.044	0.79	****
6	Atmosphere	10	6	0.60	0.205	0.50	**	9	6	0.67	0.164	0.60	***	10	7	0.70	0.117	0.66	***	10	8	0.80	0.044	0.79	****
7	Security	10	9	0.90	0.010	0.90	****	10	9	0.90	0.010	0.90	****	9	7	0.78	0.070	0.76	****	10	7	0.70	0.117	0.66	***
8	Private space	10	9	0.90	0.010	0.90	****	10	9	0.90	0.010	0.90	****	10	9	0.90	0.010	0.90	****	10	7	0.70	0.117	0.66	***
9	Opportunities for contact	10	9	0.90	0.010	0.90	****	10	9	0.90	0.010	0.90	****	10	9	0.90	0.010	0.90	****	10	7	0.70	0.117	0.66	***
10	Significant carer/caregivers	9	9	1.00	0.002	1.00	****	9	9	1.00	0.002	1.00	****	9	9	1.00	0.002	1.00	****	9	9	1.00	0.002	1.00	****
11	Continuity of being in contact with significant carer	8	7	0.88	0.031	0.87	****	8	7	0.88	0.031	0.87		9	7	0.78	0.070	0.76	****	9	8	0.89	0.018	0.89	****
		S-CVI/AVE 0.85						S-CVI/AVE 0.81						S-CVI/AVE 0.80						S-CVI/AVE 0.76
		S-CVI/UA 0.09						S-CVI/UA 0.09						S-CVI/UA 0.10						S-CVI/UA 0.10

^a I-CVI (content validity index) = number of experts providing a rating of 3 or 4/number of experts

^b p_c (probability of chance occurrence) = [N!/A!(N-A)!] × 0.5^N, N = number of experts; A = number of experts agreeing on a rating of 3 or 4

^c k* (modified kappa) = (I-CVI-p_c)(1-p_c)

^d Evaluation criteria for level of content validity: relationship between I-CVI and k*; excellent validity = I-CVI ≥ 0.78 and k* >0.74 (****); good validity I-CVI < 0.78 and ≥ 0.60 and k* ≤0.74 (***); fair validity I-CVI < 0.6 and ≥ 0.40 and k* ≤0.59 (**); poor validity I-CVI < 0.4 and k* <0.40 (*)