To ensure the clarity and relevance of these questions, the researchers conducted two focus groups. One group consisted of undergraduate psychology students who indicated no particular interest in kink, while the other included self-identified kinky individuals. The purpose of these focus groups was to verify that participants from different backgrounds understood the questions in a similar way, thereby supporting the scale’s construct validity. Based on feedback from these discussions, the researchers refined the scale, ultimately reducing it to 27 questions. These items were presented on a seven-point Likert scale, allowing participants to express varying degrees of agreement or disagreement with each statement.
https://www.psypost.org/want-to-know-how-kinky-you-are-this-new-scientific-scale-can-tell-you/
