A toxicity self-check quiz can be designed by following these steps: Identify the toxic traits or personality traits relevant to the quiz. Create a series of questions that assess the presence and severity of these traits. Assign a point value or rating to each response to determine the overall toxic style. Make sure to clearly communicate to participants that the quiz is not a diagnostic tool. Provide a disclaimer stating the quiz results should be used only to the extent that they are helpful. Consider using reliable sources and research on toxic traits to improve the accuracy of the quiz.