Open-Ended vs Closed-Ended Questions: When to Use Each (With Examples)

How to analyse open-ended answers

1. Read a sample first. Skim 50 to 100 responses before building anything.
2. Build a codebook. Züll recommends a label, definition and anchor examples per category, with a second coder checking about 10% of responses.
3. Code manually or with AI. Manual suits a few hundred answers. Above that, use AI coding and validate it against a hand-coded sample.
4. Quantify the themes. Report the share mentioning each theme, with the base size.
5. Quote verbatims. Two or three per theme. One good quote often moves a room more than a chart.

Writing tips (for both types)

Make open ended questions narrow and specific, and closed options complete and non-overlapping. Either way, ask one thing at a time.

For open-ended questions

• Focus the prompt. "What nearly stopped you buying?" beats "Any thoughts?" Open questions lack the cues a list gives, so they need sharper focus.
• Split positives and negatives into two questions, as Züll advises.
• Size the box to the answer. Smyth, Dillman, Christian and McBride (2009) found larger answer boxes substantially improved response quality among late responders, and that a short line stressing why detail matters improved answers from everyone.
• Say why it matters. "Your answer goes straight to the product team" costs eight words.

For closed-ended questions

• Write options from evidence: pilot data or past open answers.
• Make them complete and exclusive. Every respondent should have exactly one right box, or a clearly labelled multi-select.
• Balance your scales to limit response bias.
• Read your "Other" answers. They're free list improvements.

MindProbe's 30+ question types cover both sides, with logic and branching to show a "why?" only when needed. For the full catalogue of formats, see Survey Question Types: The Complete Guide, and if you're starting from a blank page, our explainer on what a questionnaire is sets out the building blocks.

EXPERT PERSPECTIVE

Eleanor Singer and Mick Couper argue open ended questions are underused. In their experience, adding a few to computerised surveys is neither expensive nor time-consuming, and respondents are willing and able to answer.

Paraphrased from Singer and Couper (2017), methods, data, analyses

Frequently Asked Questions

What is the difference between open-ended and closed-ended questions?

Open ended questions let respondents answer in their own words; closed ended questions offer fixed answers. Open questions reveal reasons, closed questions produce comparable numbers.

What are some open ended question examples?