Although the mode of interviewing will determine the complexity of the questionnaire, all good questionnaires should be designed to balance clear, understandable, easily answered questions for respondents in a format that is easily followed by interviewers and suitable for subsequent analysis by data analysts (Statistics Canada, 2003). Questionnaires that are overly complex or contain design flaws may require additional probes on the part of interviewers which can be time-consuming. Long or complex questionnaires may also decrease the willingness of respondents to cooperate or result in coding errors. Certain specific principles must be followed to ensure that the topic is reliably measured, although country-specific adaptation may be required to ensure that question wording is culturally acceptable and easily recognizable.