Investigation and research method is a research method that uses objective attitude and scientific methods to conduct on-the-spot investigation on a certain social phenomenon in a certain range, collect a large amount of data for statistical analysis and draw conclusions.
Content analysis is a type of literature research, and it is a research technique that objectively, systematically and quantitatively describes the explicit content in printed words, movies, radio, television and other media.
The control experiment method is a method of artificially designing a specific and unnatural environment according to a certain purpose and testing under the control of researchers.
The value of case study is that it has a thorough and comprehensive grasp of the information of the research object, which can provide many materials and viewpoints as the basis for other studies and draw general conclusions from the follow-up studies.
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