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Table 13 Content validity of the dimension “Environmental influences”

From: Development and evaluation of the content validity, practicability and feasibility of the Innovative dementia-oriented Assessment system for challenging behaviour in residents with dementia

  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    
  1. a I-CVI (content validity index) = number of experts providing a rating of 3 or 4/number of experts
  2. b pc (probability of chance occurrence) = [N!/A!(N-A)!] × 0.5N, N = number of experts; A = number of experts agreeing on a rating of 3 or 4
  3. c k* (modified kappa) = (I-CVI-pc)(1-pc)
  4. 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 (*)