Questionnaire and scale are not the same concept. The general scale needs to be tested many times and has certain reliability and validity before it can be officially put into use, while the questionnaire does not have so many requirements.

If you want to use the scale, it is recommended to use the mature scale designed by others. It is difficult to guarantee the reliability and validity of the scale designed by yourself. This is explained in detail in the help manual of reliability and validity analysis of spssau.

References:

reliability analysis

Validity analysis