Questionnaire Design & Participant Recruitment Guide

For researchers in HCI and Social Science. By Professor Lennart Nacke, PhD.

Questionnaire Design Basics

Break Down Your Research Focus

Split big concepts into smaller, measurable parts. For example, instead of "satisfaction," look at "speed," "ease of use," and "helpfulness."

Benefits
  • Create more precise questions
  • Get data you can analyze with statistics
  • Find insights you can actually use

Closed Questions

Multiple-choice or rating scale questions.

  • Easy to compare answers
  • Good for testing clear ideas
  • Works well with statistics

Open Questions

Questions where people write their own answers.

  • Discover unexpected ideas
  • Learn how people think about issues
  • Study complex topics

Avoid Biased Questions

Lazy Answering Bias

When people give quick, low-effort answers.

  • Keep questions simple
  • Mix up question types
  • Avoid using the same scale over and over

Social Pressure Bias

When people give "good" answers rather than honest ones.

  • Use neutral wording
  • Promise to keep answers private
  • Ask indirect questions ("Some people think..." instead of "Do you...")

Agreement Bias

When people tend to agree regardless of the question.

  • Include both positive and negative statements
  • Be specific rather than general
  • Avoid leading questions

Finding Participants

Use Multiple Recruiting Methods

Don't rely on just one way to find participants. Using several methods works much better.

Online Methods

  • Email with eye-catching subject lines
  • Social media posts on the right platforms
  • Research websites and forums
  • Professional networks

In-Person Methods

  • Ask people at relevant events
  • Put up flyers in key locations
  • Make phone calls for special groups
  • Partner with community groups

Keep Good Contact Records

A well-organized contact list leads to better response rates.

Check Contacts Regularly

Update your list every 3 months

Group Similar Contacts

Sort by field of study, skills, or demographics

Track Who Participates

Note who has helped before and how responsive they were

Record Permissions

Keep track of who gave consent to contact them

Best Times to Contact People
  • Mid-morning (9-11am) Tuesday-Thursday gets 24% more responses
  • Avoid busy times like end of semester for students
  • Plan for 2-3 weeks to collect data
  • Try lunch hours or early evenings for working adults

Writing Better Questions

Question Structure

Good Questions

  • Ask about just one thing at a time
  • Use specific rather than vague terms
  • Match to your audience's knowledge
  • Include clear time frames or references

Example: "How easily could you find the search button on a scale of 1-7?"

Bad Questions

  • Ask about multiple things at once
  • Use vague or unclear wording
  • Too complex for your audience
  • Missing time frames or context

Example: "How good was the interface?"

Rating Scales

Agreement Scales

Like "strongly disagree" to "strongly agree"

  • Good for opinions and attitudes
  • Creates standard responses
  • Works well with statistics

Number Scales

Like rating from 1-5 or 1-10

  • Good for rating performance
  • Helps compare different things
  • Measures experiences
Scale Design Tips
  • Use 5-7 points (balances detail without overwhelming)
  • Decide if you'll label all points or just ends
  • Consider whether to include a middle option
  • Make scales work well on mobile devices

Mobile-Friendly Design

Over 70% of young adults take surveys on phones. Make sure yours works well on small screens.

Use Vertical Scales

Better than horizontal on phones

Avoid Grid Questions

These are hard to use on small screens

Make Buttons Finger-Sized

Leave enough space between clickable elements

Break Up Complex Info

Show information in smaller, digestible chunks

Keep It Simple

Use clear layouts that reduce mental effort

Getting More Responses

Contact People Multiple Times

Most people won't respond to your first message. Use this sequence:

Pre-Notice

Quick message letting people know a survey is coming

Main Invitation

Full details about your survey and why it matters

First Reminder

Send 3-5 days later to those who didn't respond

Final Reminder

Send 7-10 days after invitation as a last chance

Thank You

Send thanks and share results with participants

Money Rewards

Work best when:

  • You need the general public
  • Your survey takes a lot of time
  • You need quick responses

Other Rewards

Work best when:

  • People already care about your topic
  • You want ongoing research relationships
  • Your budget is limited
Pro Tip

Small guaranteed rewards ($5 for everyone) work better than big lottery prizes (chance to win $500) for academic surveys.

Make Your Survey Engaging

Fight survey fatigue by making your survey interesting:

  • Clean, professional design
  • Progress bar showing completion
  • Interactive elements like sliders
  • Different question types to maintain interest
  • Questions that clearly relate to your stated purpose

Ethics in Research

Balance Recruitment with Ethics

  • Don't recruit people you have power over (like professors recruiting their students)
  • Be careful about identifying people by characteristics they may not want highlighted
  • Make it easy to decline participation
  • Provide enough information for informed decisions
Before You Start Checklist
Break research questions into measurable parts
Test questions with sample users
Make sure it works well on phones
Plan to use multiple recruitment methods
Create a data analysis plan
Plan how you'll communicate with participants
Add ways to check for low-quality responses

Remember: Good questionnaires balance research goals with participant experience. Plan carefully, test thoroughly, and focus on collecting data you can actually use.