This questionnaire will ask you about yourself, lifestyle, health, and sleep habits/quality. Questions that are not mandatory will let you skip ahead if you don't feel comfortable answering, or just don't want to, although we appreciate every answer you give us. We recognize that some questions are intrusive, and rather than risk a false answer, we prefer if you skip them. You can always ask the experimenter why we bother asking any question, and we will be happy to explain. If you don’t understand the question, please ask for clarification.