The problem of answering sensitive questions does not have a unique solution and may vary depending on the topic or the country. The problem is particularly important in times of crisis when unverified information can cause negative social effects. With a case study involving students from a large Russian university the present study aims to test list experimental design to define the percentage of those individuals who believe in rumours about COVID-19. The authors found that 15.6% of students believe in rumours. This share is much higher in the survey carried out using list experimental design as compared to direct question technique. The work confirms the relevance of list experimental design to study sensitive topics, in particular, people's belief in rumours. © 2020 Russian Public Opinion Research Center, VCIOM. All rights reserved.