background Before beginning the data collection in the camps, the team met multiple times to thoroughly discuss how to collect data in a secure manner. Due to the situation related to movement in the camps, researchers created meticulous plans to minimise risk to themselves and participants during the research, particularly when crossing through police checkpoints. This included a wide array of considerations, from how data would be secured, to how much money they should carry and what types of clothing they should wear when accessing different camps. International researchers worked with the YCR team in a participatory manner by co-creating strategies related to the technical aspects of research including do-no-harm perspectives, eliminating bias, and analysing data. International researchers provided technical training on the basic principles of these topics, and the YCR team adapted these principles to the refugee camp context. Ethical Review Due to the sensitive nature of the research, and to ensure the safety of both researchers and respondents, YCR recruited three ethical reviewers to review the study methods, informed consent protocols, quantitative questionnaire, and qualitative interview guides. These reviewers were humanitarian workers who held leadership positions in the Rohingya response; the reviewers also worked in protection and legal assistance positions. After reviewing the research and providing feedback, all reviewers agreed that the research should move forward. Participants and Sampling The YCR team collected data from a total of 295 Rohingya respondents, including 241 individuals who completed quantitative surveys and another 54 who participated in in-depth interviews, from 30 camps across Cox’s Bazar District. The team also conducted key informant interviews with four Armed Police Battalion (APBn) officers related to their experiences enforcing restrictions on freedom of movement in the camps. Survey respondents were randomly selected. The YCR team used a random number generator to select two random blocks within each camp; once the blocks were selected, respondents for five surveys were selected by approaching every tenth household in the block to request participation in the interview.36 Using this strategy, the team attempted to collect 10 surveys (five from each randomly selected block) from each camp; although, due to challenges encountered during the study, the team fell just short of this goal. Purposive sampling was used to select qualitative interview respondents. To ensure a diverse set of responses related to movement restrictions, respondents were selected from each camp based on their positions in Rohingya society. YCR prioritised block majis (block-level camp officials), mullahs (religious scholars), community elders, daily labourers, international non-governmental organisation (INGO) volunteers, teachers, young adults, and housekeepers for inclusion in the study. Rohingya in leadership positions were selected due to their knowledge of overall community concerns and dynamics, while others were selected to ensure that the study captured diverse experiences related to movement. 36 The refugee camps are further subdivided into smaller blocks that were used during the selection process to ensure representativeness. 20