1. Unbiased.
2. Avoid vagueness/ambiguity
3. Order of questions (logical manner, increasing importance)
4. Simple language
5. Double-barreled
6. Title
7. Preamble/preface/intro
8. Number of questions
2. Avoid vagueness/ambiguity
3. Order of questions (logical manner, increasing importance)
4. Simple language
5. Double-barreled
6. Title
7. Preamble/preface/intro
8. Number of questions
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