hi, your question is not clear. Questionnaire is a tool for survey in order to measure employees determination by themselves. It'a items can be adopted or adapted from previous literature or can be constructed by the researchers with the help of a panel of experts through pre and post pilot run for the validity (face, construct such as discriminant and convergent validity) and reliability issues. So, please explain more.
my research topic is based on workplace bullying in the organization, in this case, I take self-determination needs scale as a mediator variable when I search this scale on the internet I found many scales then I confused that which variable would be appropriate for my research.