This online survey is being conducted by Dmitri Katz, a PhD student at The Open University, UK. Dmitri is interested in improving diabetes care by investigating how people living with Type 1 Diabetes make decisions about their diabetes management. We hope that the information collected will help guide designers in creating easier to understand ways of displaying personal health data. We will be asking about your opinions, thoughts and experiences, and will not give any advice on your current diabetes treatment. You must be at least 18 years old, and under medical treatment for T1 diabetes. The questionnaire should take about 5-10 minutes to complete, and there are no known risks to taking part in this research. You do not need to identify yourself, but if you choose to provide an email address to receive the results of this research or to be contacted if there are any further questions, it will be stored separately from your answers that will be identified only by a code number. Only the principal university researchers will have access to this data. If you do choose to provide contact details or personally identifying information it will be stored securely in accordance with the UK Data Protection Act 1988 and relevant European Data Protection legislation. This research is in part being supported by a research grant from the European Research Council, the UK Engineering and Physical Sciences Research Council, and researchers from the Open University. You may choose to withdraw your data from the survey through email notification until the end of the collection period in July 2017. Once we have begun to analyze the data we will no longer be able to remove your answers. However, if you choose to submit an email address, this can be removed at any time upon your request. Please note that completion and submission of this questionnaire implies consent to your data being used for the academic research purposed, and your answers (in anonymized form) may be used or quoted in published academic literature. If you have any questions about this research, please contact Dmitri directly (+49 (0) 177 494 4496, email@example.com). If you have any concerns about the research you can contact Dmitri’s supervisor, Blaine Price (+44 (0)1908 653 701, firstname.lastname@example.org). Ethics approval for this survey was granted by The Open University Human Research Ethics Committee (HREC/2017/2524/Katz/1). Thank you for your time.