I'm working on a master's thesis in UX design that I might want to turn into a commercial project later on. The subject matter is use of Nonviolent Communication (NVC) in parenting.
For the research phase, as part of a screener, I want to get a sense of a person's parenting style. I've been looking for questionnaires on evaluating parenting styles and found the Parental Authority Questionnaire.
However, this questionnaire was made to be evaluated by children, not by the parents themselves. Is there an alternate questionnaire for them? Would I be able to use its questions in my screener? What are the regulations regarding using questions from a different questionnaire?