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Disclaimer: This questionnaire should only be completed if you are older than 15 years old. If you are under 15, please do not complete the questionnaire, although we do appreciate your interest in the subject. The results of the questionnaire will only be used for research purposes in the context of the Tour-x project. Participating in the assessment is on a voluntary basis and you will receive no payment or reward for it. If you are not sure about whether you should participate, then please discuss it with your parent(s), legal guardian(s) or teacher(s).