The validity of the expert questionnaire was verified, and the objective consistency index (IOC) was used to evaluate it. The IOC research based on REF was studied (Swimmel Tritanant,2550,n, n.). 165) By inputting the scores of all the evaluated experts into the analysis model, the consistency between the questions and the purpose is analyzed to obtain the average value, in which each question needs to get the IOC value starting from 0. Therefore, the above problems are considered accurate and can be measured according to the purpose to be measured.
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