What are some important points to consider when organizing the physical layout of a questionnaire?

•   Give each question a number.
•   Never cram questions together or create a confusing appearance.
•   For your administrative use, make a cover sheet or face sheet for each interview.
•   Give interviewers or respondents instructions on the questionnaire and print instructions in a different style from the questions.
•   In mail surveys, include a polite, professional cover letter on letterhead stationery, identifying the researcher and offering a telephone number for questions.
•   Always end with “Thank you for your participation.”

Thanks!