Come and check the quality of the questionnaires that analyze or monitor the quality of the questionnaire, there are several ways, but there are two important methods include:1. (Validity) refers to a tool that can measure the things that you want to measure by.Can be divided into three categories:1.) follow the content (Content Validity). (2) the criterion Validity Criterion-related3.) follow the structure (Construct Validity). 2. precision (Reliability) refers to tools that are "invariably there is a tool that.Built to exact measurement is a measurement result will be the same.
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