1. It is difficult to explain the survey results.
The investigation method is carried out in a natural state, and many factual phenomena may occur at the same time, so it is difficult to distinguish the order of the phenomena. It is also difficult to control some factors unrelated to the survey topic, which makes the survey results influenced by many complex factors, and it is difficult to explain the survey results, especially to judge the causal relationship between phenomena.
2. The reliability of the survey results depends largely on the cooperative attitude of the respondents.
The survey obtains data and information through questionnaires, interviews and other forms of respondents. Therefore, the objectivity and authenticity of the phenomena and facts reflected by the respondents determine the reliability of the information obtained in the investigation. For various reasons, in the investigation, the respondents often intentionally or unintentionally infiltrated their own subjective intentions or prejudices to a certain extent, or concealed some facts, so it is often difficult for researchers to control the degree of subjective participation, thus affecting the reliability of the investigation results.