Keep it short
SurveyMonkey took 100,000 surveys which were 1-30 questions long, and analyzed the median amount of time that respondents took to complete the surveys. In an perfect world the average time it takes to answer a question should not vary based on the length of the survey. But the world is not perfect, as we all know. And the result shows that the longer the survey, the shorter the respondent used on each question.
| Number of questions | Average seconds spent pr question | Total survey completion time |
| 1 | 75 | 1 min 15 sec |
| 2 | 40 | 2 min |
| 3-10 | 30 | 2-5 min |
| 11-15 | 25 | 5-7 min |
| 16-25 | 21 | 7-9 min |
| 26-30 | 19 | 9-10 min |
In fact in a survey longer than 30 questions, the average amount of time spend on each question is only half of that compared to surveys with less than 30 questions. Knowing this you must tune your survey or questionnaire because you want as many as possible to completed the surveys and the respondents to stay focused all the way through.
This means you'll have to:
- Ask only relevant questions.
- Make the questions easy to understand.
- Test your survey.
Read How Much Time are Respondents Willing to Spend on Your Survey? by SurveyMonkey.