How Many Questionnaires Is Enough for a Dissertation?

For most audience research projects, we recommend collecting 400 questionnaires. We are not alone in this general rule of thumb—400 is considered by some researchers (and market researchers in particular) to be the “magic number” in the world of sample sizes.

How many questions should a dissertation questionnaire have?

The Ideal Number of Survey Questions for Most Surveys

Five minute surveys will see even higher completion rates, especially with customer satisfaction and feedback surveys. This means, you should aim for 10 survey questions (or fewer, if you are using multiple text and essay box question types).

How many questionnaires is enough for research?

As a rule of thumb, one should use multiplier of minimum five to determine the sample size i.e. if you are having 30 questions in your questionnaire multiply it with 5 = 150 responses (minimum).

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.