The core questionnaire includes 8 questions designed to test knowledge (Table 5). These vary in style and content in order to avoid undue biases that could be caused by different ways of processing information across certain types of people or cultural norms. Whilst some knowledge questions allow a person to give a completely free response others provide a list of possible answers, from which the respondent must choose their response. The questionnaire also encourages respondents to say if they don't know the answer to something, in order to dissuade them from guessing (as we want to capture actual levels of.
