The document discusses different approaches to developing questionnaires and surveys:
- Questionnaires should be concise and avoid double-barreled questions that ask about multiple topics. Single topics per question are preferred.
- Multiple questions may be needed to fully understand topics like opinions or beliefs. Asking related questions separately yields clearer responses.
- Filler questions can be added to disguise the purpose of the questionnaire but should otherwise be avoided to keep the survey concise.