IOC refers to consistency between the objective questions (Index of Item-Objective Congruence: IOC) is used to check the quality of the query terms to determine whether the question of content coverage area meets the purposes or not. Normally, the IOC will use the discretion of a group of 5 professionals in the score, and then researchers so that each points to correspond to the answers of the Group of experts, and then the score plus individual experts in each verse, and then divided by the number of experts, it will be up to question in the IOC.
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