Advantages compared with traditional questionnaire survey methods

The advantages of questionnaire survey method are as follows: ① anonymous access is conducive to obtaining real information; (2) Collecting more personal data will help to neutralize the extreme answers of individuals; ③ The content, time and format of collected data are basically unified, and the data processing is relatively easy, which is convenient for comparative analysis; ④ Accessing multiple objects at the same time saves a lot of resources. Item A is the advantage of case study; Item b is the advantage of action research; Item d is the advantage of experimental research.