Does the questionnaire have to be tested for reliability and validity?

The questionnaire must be tested for reliability and validity, because the questionnaire survey is often only one link of the entire project. Under the correct project goals, there will be additional credibility of the survey and effective analysis to support the survey. As a result, the questionnaire survey will have credibility and the results will tend to be accurate data.

Questionnaire survey method is a survey method widely used in research. The questionnaire designed according to the purpose of the survey is a tool for obtaining information through the questionnaire survey method. Its quality affects the authenticity and validity of the survey results. has a decisive role. Reliability refers to the consistency, stability and reliability of test results. Generally, internal consistency is used to express the reliability of the test. The higher the reliability coefficient, the more consistent, stable and reliable the test results are. Systematic errors have little effect on reliability because they always affect measurements in the same way and therefore do not cause inconsistency. Conversely, random errors may lead to inconsistencies, thereby reducing reliability. Reliability can be defined as the extent to which random error R affects the measured value. If R=0, the measurement is considered completely reliable and has the highest reliability.

If you want to know more about Questionnaire Star, it is recommended to consult Questionnaire Star. Questionnaire Star has 6.2 million high-quality sample database members and a professional research technology team with 16 years of experience. It can provide business research services and empower enterprises. Enterprise market decision-making; at the same time, the questionnaire survey system supports more than 30 question types, and jump, association and reference logic can be set; it supports data collection through WeChat, email and SMS, etc. After data recovery, classification statistics, cross-analysis can be carried out, and Export to Word, Excel, SPSS, etc.