Conventionally, the longer a survey takes to complete, the less likely it's to be completed. It's not only about the number of questions but the overall time and time perception.

To increase the engagement of your surveys:

• Ask only relevant questions
• Limit the number of questions
• Be mindful of how much time it takes to complete the survey
• Allow respondents to skip questions they don't want to answer
• Keep participants informed about how long it would take to complete a survey and the number of questions left