Observation reliability needs to reach (b) or above to be better? a、0.75 B、0.85 C、0.65 D、0.95

Questionnaire analysis mostly adopts reliability and validity analysis, and even generally requires mature questionnaires, which are applicable to both undergraduate and graduate papers.

Reliability and validity are the prerequisites for the quality of the questionnaire. If the reliability and validity of the questionnaire are good, it proves that the data of the questionnaire are reliable and the internal consistency of the questionnaire data is high, which can be used for subsequent modeling and analysis. On the other hand, if the reliability and validity are not high, the questionnaire may need to be redesigned and distributed.

reliability analysis

Cronbach's alpha coefficient is the most important factor in spss analysis. The operation steps are as follows: Click Analyze-Zoom-Reliability Analysis-Options-OK, just put the questions in the questionnaire into the options box of reliability analysis:

The result is shown in the following figure:

Cronbach's alpha coefficient range and reliability effect: 0.80 ~ 0.90 is very good, 0.70 ~ 0.80 is very good; 0.65 ~ 0.70 minimum acceptable value; 0.60 ~ 0.65 is best not; ?

So as can be seen from the above table, the reliability of the questionnaire is quite good. (Different references have different requirements for this coefficient. Generally speaking, Cronbach's alpha coefficient greater than 0.7 is acceptable. )

efficiency analysis

When using spss, the method of validity analysis is factor analysis.