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Table 2 Content validity index before and after expert ratings

From: Assessing the application of non-pharmacological interventions for people with dementia in German nursing homes: feasibility and content validity of the dementia care questionnaire (DemCare-Q)

Version 1 question no. Indicated problem Category Initial I-CVI’s1 Revision Final I-CVI’s2
1. Response set Completeness .14 Addition of 4 items .86
Reasonability .75 1.0
11. Response set Completeness .67 Addition of 2 items, deletion of 1 item, rewording of single items, addition of item examples .86
Reasonability .56 .86
12. Question Relevance .67 Deleted /
14. Response set Completeness .63 Summarization of items, revision of items .43
Reasonability .38 .43
14. (Frequency) Response set Completeness .75 Retained /
16. Question Comprehensibility .67 Reworded 1.0
Response set Completeness .50 Addition of 1 item 1.0
Reasonability .56 1.0
20. Response set Reasonability .67 Rewording and summarization of items .71
Completeness .75 .86
21. Question Comprehensibility .63 Addition of examples 1.0
22. Question Comprehensibility .56 Adaption of reference period .86
23. Response set Completeness .56 Addition of one item 1.0
  1. 1Threshold value for content validity.88 (based on eight rater judgments).
  2. 2Threshold value for content validity .86 (based on seven rater judgments).