A description of social class is currently not included in the questionnaire. The questionnaire was thoroughly tested before the pilot, and our analysis of pilot responses showed there wasn’t a higher level of ‘Don’t know’ responses at this question compared to others, which suggests learners generally were not confused by the question. Also note that the question does not ask learners to identify what social class they belong to – just their perception of whether they interact with people from different social classes to their own.