Hua DONG,Tongji University Checklist to help avoid problems (1) Keep the language simple Keep questions short Avoid double-barrelled questions Avoid leading questions Avoid questions in the negative Ask questions only where respondents are likely to have the knowledge needed to answerChecklist to help avoid problems (1) Keep the language simple Keep questions short Avoid double-barrelled questions Avoid leading questions Avoid questions in the negative Ask questions only where respondents are likely to have the knowledge needed to answer ©Hua DONG, Tongji University