Participant Screening

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What is Participant Screening?

Participant screening is a process to filter participants for user research and market research. Researchers find the right participants with screener questionnaires.

User researchers use screener questions to get relevant data and make informed decisions about who should participate in a study. The selection of the right participants is essential to get accurate and useful insights. Participants should represent potential users and have relevant knowledge and user experience (UX).

In the video, Human-Computer Interaction and UX Expert William Hudson explains how best to screen research participants.

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Why is Participant Screening Important in UX Research?

Participant screening is a foundational step in UX research. With thorough screening processes, researchers can guarantee their work effectively informs and improves the design process, which ultimately leads to better user experiences. Below are a few reasons why teams should invest in participant screening:

  • When researchers select participants who reflect the target user base, they can gather insights that are directly applicable to the users they design for—crucial for informed design decisions.

  • Screening focuses research on individuals whose experiences and feedback are most valuable. It’s important in studies with limited time and resources.

  • Participant screening contributes to the overall validity and reliability of the research findings. If the study includes a representative sample of the user population, researchers can be more confident their results are accurate and apply them to the broader user base.

  • Proper screening helps mitigate selection bias. This is critical to create inclusive and equitable designs.

  • In research that involves meaningful comparisons of different user groups—e.g., experts vs. novices—participant screening makes sure participants accurately represent these groups.

  • With a clear understanding of participants’ characteristics, researchers can tailor research methods and questions to elicit deeper insights. For example, understanding participants' familiarity with social media platforms can inform how to structure a user interview or usability test.

“You do research because you want to have impact. […] If you don’t have high-quality participants, that’s kind of a non-starter […] If you're not talking to the right people, it's really hard to make the right decisions.”

— John-Henry Forster, Former Senior Vice President of Product at User Interviews

How to Screen Participants

It can be a challenge for researchers to recruit participants for user research studies. They must find interested individuals, arrange the study appointments, incentivize prompt attendance and reliably organize it all. 

Additionally, researchers must filter out attendees who lack the right type of experiences to provide valuable feedback or insights; subpar participants can impact research quality and design choices in adverse ways. 

Researchers should follow the steps below to screen participants efficiently and effectively:

1. Choose Criteria for Participants

The first step to decide who to screen out. Behaviors, experiences and attitudes are the best criteria to define user groups. These are psychographics. Other information like gender, age or location are demographics.

User researchers often prefer psychographics. Good criteria to screen participants might include: 

  • How familiar are they with a product: Screening participants based on their familiarity with the product helps researchers understand different levels of user experience, from novices to experts. This can shed light on how intuitive a product is for new users versus the additional functionalities that more seasoned users may leverage.

  • What they use a product for: Researchers need to understand what users use the product for to identify different use cases and the specific needs of each. This can help customize the product to meet varied user expectations and use conditions.

  • How often they use a product: This can help differentiate between occasional users and power users and provide insights into how the product fits into daily routines and its perceived value to different user segments.

  • Where they use a product (also called "context of use"): The knowledge of where users typically interact with the product—e.g., at home, at work, in transit—can uncover contextual factors that impact the user experience.

With the careful selection of criteria based on psychographics, researchers can create more effective screener questionnaires to identify the most relevant participants for their studies. This ensures realistic results grounded in the actual user behavior and attitudes, which leads to more informed and actionable design decisions.

2. Design Screener Questions

The objective of screener questions is to obtain genuine and unbiased insights from potential participants. Researchers should take into account that participants—unknowingly—often give answers they think a researcher wants to hear. That’s why, researchers should ask non-leading and open-ended questions. 

For example, to test how often users use Facebook to search and find musical events, researchers would not want to ask:

“Is Facebook a good way to find musical events?” 

But rather:

“How do you use social media?”

This is because they do not want to give away the purpose of the study upfront. The goal is for participants to answer honestly, and thus questions should not lead to a particular answer. Some participants might just want to participate in the study for an incentive and thus are willing to not answer honestly.

For example, the following screener question reveals the objective to the participants that the researchers might be looking for: 

“Do you play mobile games at least once a week?”

Instead, a more neutral question is:

“What do you typically do in your free time on a weekly basis?”[LT3] 

If asked the first question, participants would potentially have the idea the research is about mobile game apps and would likely respond in a way they believe aligns with the researcher's expectations or their interpretation of what seems like the “right” answer. 

Open-ended and non-leading questions encourage participants to share their experiences and behaviors without bias. This type of question does not imply that there is a correct answer or a particular perspective that the researcher wants. As a result, participants are more likely to provide candid and varied responses, which can offer deeper and more meaningful insights into their habits, needs and preferences. 

Overall, these questions allow user researchers to better select their participants, so they truly represent the user group and select those for further UX research methods like card sorting, user testing, etc. Ultimately, the goal is to select participants who can provide the most relevant and insightful feedback for the particular study.

3. Recruit the Right Participants

As the team completes their screener questions, they can start to think about participant recruitment. Researchers should use the screener questions to filter out participants who do not match the target audience necessary for testing new or existing designs.  

The success of UX research relies on the recruitment of the right participants. Researchers can employ various methods based on the study's needs, timeline and budget. There are several options to recruit the right participants:

A large group of people walk through a funnel and only a few come out in a single-file line as the chosen participants.

It’s imperative user researchers funnel out the wrong participants for the study, so the results are true and relevant to the design project.

© Interaction Design Foundation, CC BY-SA 4.0

  • Use a recruiting agency: Specialized agencies can streamline the recruitment process via their networks of potential participants. They can quickly identify and screen individuals based on the study’s requirements. While this method can save time and guarantee a high-quality pool of participants, it is often more expensive than other options.

  • Use an automated recruiting platform: Platforms automate the recruitment and screening processes using algorithms and databases. They offer access to a broad audience and can filter participants based on specific criteria. This method is efficient and cost-effective but may require additional screening to ensure participant quality.

  • Use existing users: Recruit from your product's current user base to provide valuable insights, especially for feedback on new features or usability testing. These participants already engage and are familiar with the product, which can lead to more relevant feedback. However, to maintain a balance and avoid bias, it’s best to include new users, too.

  • Use hallway recruiting or guerilla testing: Researchers approach people in public spaces or within their own organizations for quick and informal testing or interviews. It’s fast and low-cost but may not always provide participants who are representative of your target user base.

  • Use online forums and social media: Platforms such as Reddit, LinkedIn or specific forums can be excellent sources to find participants with particular characteristics or interests. This method is cost-effective and can reach a wide audience, but it requires more effort to screen and validate.

To achieve success, customize screener questions and the recruitment process according to your study's objectives and context. Continuously refine questions to align with research goals and participant profiles. Remain flexible and patient in recruitment to adapt to changing demographics and availability.

4. Review All Screener Responses

After collecting screener responses, researchers analyze the data to identify candidates who match the study criteria and bring diverse perspectives and experiences to the research. Researchers score responses based on relevance to the research objectives and create comprehensive participant profiles. Scoring allows for objective ranking, while profiling delves into nuances like psychographics and demographics.

Researchers compare profiles against study requirements to find candidates who meet the basic criteria and offer diverse insights. Iterative analysis may refine criteria or explore data deeper for a balanced participant group. This careful selection process guarantees the outcomes will be relevant, robust and actionable.

At this point in the process, researchers can also take the opportunity to choose “floaters” or backup participants even if they don’t fully match the criteria for the target audience. 

For example, if the target audience of a study includes university students studying for their PhDs and one drops out of the study at the last minute, researchers could include a university student studying for a Master's degree. While they don’t match the criteria 100%, they might be a convenient replacement to fill the empty spot on short notice. 

5. Communicate with Chosen Participants

Researchers may follow up with potential participants to verify their information and confirm their willingness and availability to participate in the study. Researchers should:

  1. Schedule sessions and prepare participants: Finally, researchers schedule study sessions and provide participants with all necessary information, such as the study location (for in-person studies), technical requirements (for remote studies) and what to expect during the session—study duration, pre-study questionnaires, the setup of specific apps, etc.

  2. Verify information: It's essential to confirm the accuracy of the information participants provided during screening. This can include the reconfirmation of demographic details, previous experiences or specific behaviors relevant to the study. This certifies participants fit the intended profile and will contribute meaningfully to the research outcomes or if the researchers should replace them.

  3. Confirm willingness and availability: Researchers need to verify participants remain interested and available to participate. Review session dates and times, any compensation offered and confirm participants understand the commitment required. At this point, the team should openly discuss and sign any legal matters like non-disclosure agreements (NDAs) and privacy permissions.

  4. Technical requirements: For remote studies, researchers must see to it participants have the necessary technical capabilities. Verify internet connection speed, guarantee compatibility with the virtual meeting software and provide troubleshooting support for technical issues.

When researchers meticulously follow these steps, they can facilitate a smooth and efficient study process with well-informed and prepared participants who are comfortable with their involvement in the research. Through goodwill, researchers can potentially keep the door open with participants for future research collaborations, as well.

Common Pitfalls in Participant Screening and How to Avoid Them

Common pitfalls in participant screening include:

  • The recruitment of participants who don't fit the profile needed for the study. 

  • The underestimation of the importance of screening questions.

  • The disregard for the diversity required to obtain comprehensive insights. 

Researchers can avoid these pitfalls if they clearly define the target audience and their characteristics before recruitment, create precise and relevant screening questions to filter out unsuitable candidates and supply a diverse participant pool for varied perspectives.

Actionable insights include the revision of screening questionnaires based on initial feedback with frequent consistency checks, the continuous observation of the recruitment process to ensure it attracts the right participants—to avoid “failing participants,” the alteration of the questions’ language to avoid “straightlined results” and report and score those who simply try to game the system.

Watch and listen as William Hudson explains the various pitfalls researchers encounter during the recruitment process and how best to avoid them.

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For instance, if a study aims to understand the behaviors of experienced scuba divers, the screening process should first include open-ended and non-leading questions to confirm the participants scuba dive. Then, more specific questions about their scuba diving experience levels, such as the number of training hours they’ve logged, the depths and locations they’ve dove, the number of years they've scuba dove or the frequency of their dives.

If a participant responds they have the highest level of scuba diving experience along with the highest number of training hours, the deepest depths dove, the most locations dove, the most number of years and the highest dive frequency, then there’s a good indication the results might be straightlined.

How to Recruit for Accessibility Research

A venn diagram of accessibility and usability showcasing where they intersect: user experience.

Designers need to design for all users and keep in mind the user experience looks, feels and sounds different to everyone, especially those with disabilities. It starts with recruitment, screening and serious user research. Accessibility is usability that focuses on people with disabilities.

© Interaction Design Foundation, CC BY-SA 4.0

Researchers recruit and screen participants for accessibility studies through specific strategies tailored to include individuals with disabilities. Examine the approach below:

1. Clearly identify what types of disabilities are relevant to the study. Accessibility includes a wide range of needs, including visual, auditory, motor and cognitive impairments. Researchers should test for exactly who they need—a hard-of-hearing person will most likely not have the same responses as someone with a learning disability, for example.

2. Use platforms and organizations that cater to individuals with disabilities. This could include disability advocacy groups or job fairs, online communities, schools and specialized agencies. The recruitment message should be accessible with clear language and alternative formats as needed.

3. Design accessible screening questionnaires for all potential participants. This includes the use of screen-reader-friendly formats, options for those with visual impairments and clear and straightforward language with language options.

4. Communicate with potential participants to accommodate their needs. For instance, you could provide information in Braille, use sign language interpreters or employ text-based communication for those who have auditory impairments.

5. Be flexible in scheduling sessions and consider the various needs of participants with disabilities. This includes transportation challenges and the need for breaks during sessions.

6. Establish the screening process respects participants' dignity and privacy. Be sensitive during the discussion of disabilities. Use gentle language and avoid making assumptions about participants' abilities.

In the video below, UX Expert and CEO of Experience Dynamics, Frank Spillers, discusses more about the recruitment process for accessibility tests in UX design. 

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Access the Accessibility Template mentioned in the video below:

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Learn More about Participant Screening

Dive deeper into user research with our courses:
Data-Driven Design: Quantitative Research for UX
Conducting Usability Testing
User Research – Methods and Best Practices

Read more from the IxDF: How to Screen Research Participants and The Basics of Recruiting Participants for User Research.

Watch the IxDF Master Class How to Get Started with Usability Testing with Cory Lebson for more user research insights. 

Usability.gov offers a handy Guide to Recruiting Usability Test Participants.

Michael Margolis, UX Research Partner at GV offers a primer on Finding Participants.

Learn about participant screening in the insightful article, Recruiting and Screening Candidates for User Research Projects, as well as the importance of “floaters” in How and Why to Recruit Backup Participants (aka “Floaters”) in User Research from Nielsen Norman Group.

Read about tips for effective participant screening from this article, 11 tips for effectively screening test participants from User Testing.

Learn how to create screener surveys via User Interviews.

Listen to Former User Interviews’ Senior Vice President, JH Forster, in the Awkard Silences podcast episode Unlocking Innovation with the Right Research Participants.

Questions related to Participant Screening

What ethical considerations should I be aware of during participant screening?

During participant screening, you should be aware of several ethical considerations to ensure the process is fair, respectful, and protects the rights of participants:

  • Informed consent: Make sure participants understand the purpose of the user research study, what participation involves and any potential risks or benefits. Obtain their informed consent before they participate in any screening or research activities.

  • Privacy and confidentiality: Protect participants' personal information. Only collect data necessary for the study and keep it confidential. Use secure methods to store and handle data.

  • Non-discrimination: Avoid discrimination in the screening process. Verify the criteria do not unjustly exclude individuals based on race, gender, age, disability or other factors to the study's objectives.

  • Transparency: Be clear and honest about the purpose of the screening and the nature of the study. Avoid misleading participants about the study's goals or their role in it.

  • Voluntary participation: Participation should always be voluntary. Participants should know they can withdraw from the screening or study at any time without penalty.

  • Respect for participants: Treat all potential and selected participants with respect and dignity. This includes respecting their time and the provision of clear instructions and feedback.

Follow along with Creativity Expert and IxDF Instructor Alan Dix as he discusses building trust during the research process. 

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How can I ensure diversity in my UX research participant group?

To guarantee diversity in your UX research participant group, follow these strategies:

  • Define what diversity means for your project: Understand the dimensions of diversity relevant to the research, such as age, gender, ethnicity, geographic location and user experience level.

  • Set clear recruitment goals: Based on the project definition, establish concrete, measurable objectives for participant diversity.

  • Use varied recruitment methods: Don't rely on a single channel. Use different platforms and methods to reach a wide range of potential participants.

  • Screen for diversity: Incorporate questions in the screening process so your participants meet the diversity criteria you've set.

  • Monitor and adjust: Continually assess the diversity of the participant pool and make adjustments to the recruitment strategy as needed.

What are some popular books about participant screening?

While there might not be books entirely dedicated to the topic of participant screening alone, as it usually falls under the wider umbrellas of UX research, market research or psychology. However, several popular books provide substantial insights into participant screening as part of their broader discussion on research methodologies:

Kuniavsky, M. (2003). Observing the User Experience: A Practitioner's Guide to User Research. San Francisco, CA: Morgan Kaufmann. This book provides a comprehensive overview of user experience research, including methods for recruiting and screening participants. It's an excellent resource for anyone involved in UX design and research.

Hall, E. (2013). Just Enough Research. New York, NY: A Book Apart. Erika Hall's book is known for its practical advice and straightforward approach to research in design. It includes sections on how to conduct effective research, which inherently involves participant screening.

Portigal, S. (2023). Interviewing Users: How to Uncover Compelling Insights. Brooklyn, NY: Rosenfeld Media.- While focusing more on the interviewing aspect, this book also delves into how to find and select the right participants for user interviews, which is a crucial part of the screening process.

Buley, L. (2013). The User Experience Team of One: A Research and Design Survival Guide. Brooklyn, NY: Rosenfeld Media. This book is particularly useful for solo researchers or small teams. It covers a range of topics including how to conduct research effectively, which involves identifying and screening the right participants.

How do I handle sensitive information collected during participant screening?

Handle sensitive information collected during participant screening with strict adherence to data collection and protection principles for confidentiality and security. Here are steps to properly manage this information:

  1. Keep data anonymous: Remove or alter any personal identifiers from the data as soon as possible. Use codes or pseudonyms instead of real names.

  2. Secure storage: Store sensitive information in secure, encrypted formats. Limit access to this data to only those who need it for the study.

  3. Consent and transparency: Confirm participants are aware of what sensitive information the team will collect, why it is necessary and how the researchers will use it. Obtain attendees’ informed consent specifically for the use and storage of sensitive data.

  4. Data minimization: Only collect information that is absolutely necessary for the objectives of the study.

  5. Compliance with laws and regulations: Adhere to local and international data protection laws and regulations, such as the General Data Protection Regulation (GDPR).

  6. Data usage limits: Use the sensitive information only for the purposes stated during the consent process. Do not use the data for unrelated studies or activities without obtaining additional consent.

  7. Data disposal: Once the study no longer needs the data or after it concludes, securely dispose of the sensitive information according to proper data destruction protocols.

What are the differences between screening for qualitative versus quantitative studies?

Follow along as William Hudson, UX Research Expert, discusses the difference between qualitative and quantitative research:

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Screening for Qualitative Studies:

  • Screen for participants who can provide rich, detailed responses. Qualitative research seeks in-depth insights, so participants should be comfortable with open-ended questions and discussions.

  • Select a diverse range of participants who can offer varied viewpoints. While the sample size is generally smaller, the goal is to cover a wide spectrum of experiences and attitudes.

  • Choose participants who are articulate and willing to share their thoughts and feelings. The ability to communicate experiences and opinions is crucial in qualitative studies.

Screening for Quantitative Studies:

  • Screen for participants who represent the larger population for the study. Quantitative research aims to generalize results, so the sample should accurately reflect the demographics of the target audience.

  • Plan for a larger number of participants, as statistical validity requires larger sample sizes than qualitative research.

  • While qualitative research may allow for more flexibility in participant selection, quantitative studies often require stricter adherence to predefined criteria to ensure the sample's relevance to the research questions.

In summary, qualitative screening focuses on finding participants who can provide depth and narrative, while quantitative screening emphasizes representativeness and adherence to specific demographic or behavioral criteria.

Can I use social media for participant screening and recruitment?

Yes, you can use social media for participant screening and recruitment in UX research. Social media platforms like LinkedIn, Reddit, Instagram, TikTok, etc., offer a vast pool of potential participants which makes them valuable tools to reach diverse and specific demographics. 

To do so, researchers can identify target platforms—for example, LinkedIn might be more suitable for professionals, while Instagram or TikTok could be better for younger audiences. Develop compelling posts or ads that clearly outline what the study requires from participants and what they can expect from it. The message should resonate with the target audience you wish to recruit.

Use relevant hashtags to reach broader audiences or post in specific groups related to your research area—find participants who are genuinely interested in the topic and direct interested individuals to a screening survey or form to collect more detailed information to validate they meet the study criteria.

“Monitor, engage, and be transparent; these have always been the keys to success in the digital space.”

— Dallas Lawrence, Chief Strategy & Communications Officer at Telly

How do I screen participants for remote versus in-person UX studies?

Remote Studies:

  • Technical requirements: Screen for participants who have the necessary technology, such as a reliable internet connection, a computer or mobile device and any specific software or apps required for the remote study.

  • Digital proficiency: Guarantee participants are comfortable using digital tools and platforms, as they will need to navigate these independently during the study.

  • Time zone considerations: Consider participants' time zones to schedule sessions that are convenient for everyone involved.

  • Communication skills: Look for participants who can communicate clearly and effectively in a remote setting, as misunderstandings can be more common without face-to-face interaction.

Once the screening is complete, teams can continue their remote work with unmoderated remote usability tests. Learn more with IxDF’s 4 Common Types of Usability Tests template:

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In-Person Studies:

  • Geographic location: Screen for participants located near the study venue or willing to travel to the location.

  • Availability: Confirm participants can come to the study location at the scheduled times.

  • Health and safety: Depending on current health guidelines, screen for participants who meet certain health criteria or agree to follow safety protocols during in-person sessions.

How many participants should I screen to find the ideal candidate for my study?

The number of participants to screen to find the ideal candidate for a research study depends on several factors, such as the specificity of the criteria, the diversity of the target population and the overall size of the desired participant group. Generally, it’s better to screen a larger pool than the target number to account for individuals who may not meet all criteria or may drop out of the study.

For qualitative studies, a smaller, more focused participant group is usually sufficient. In quantitative studies aimed at statistical analysis, you may need to screen many more participants to ensure a representative sample of the broader population. 40 to 50 attendees is a good start, but studies can go up to hundreds or even thousands of individuals, depending on the study's scale and the prevalence of the target demographic.

In quantitative research, a good sample size is crucial for reliable results. William Hudson, CEO of Syntagm, talks about the importance of statistical significance with an example in the video below. 

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What are examples to compensate UX research participants?

Compensation for UX research participants can vary widely depending on the study's length, complexity and target demographic. Whenever possible, give participants options for how they receive compensation. Choices can increase participation rates and participant satisfaction. Some ideas include:

How do I follow up with participants after the screening process?

Following up with participants after the screening process is paramount to maintain engagement and a smooth execution of your study. Here's how to effectively manage this process:

1. Send a thank-you message immediately after the screening—express gratitude for their time and interest. This sets a positive tone for future interactions.

2. Inform participants about the next steps. Let them know whether they have been selected for the study and provide details about what they should expect if they move forward.

3. For those chosen, arrange the study sessions promptly. Offer multiple time slots and use scheduling tools to make the process easier for both parties.

4. Send any necessary materials or information they need to prepare for the study. This could include consent forms, guidelines or background information about the study.

For guidance in this arena, use the IxDF’s Research Consent Form template: 

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5. Send reminders as the study date approaches. Include the date, time, location (for in-person studies) or instructions (for remote studies) so participants are well-prepared.

6. After the study, follow up with participants to thank them again and offer an opportunity for them to provide feedback on their experience. This can improve future studies and participant satisfaction.

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Literature on Participant Screening

Here’s the entire UX literature on Participant Screening by the Interaction Design Foundation, collated in one place:

Learn more about Participant Screening

Take a deep dive into Participant Screening with our course Data-Driven Design: Quantitative Research for UX .

Quantitative research is about understanding user behavior at scale. In most cases the methods we’ll discuss are complementary to the qualitative approaches more commonly employed in user experience. In this course you’ll learn what quantitative methods have to offer and how they can help paint a broader picture of your users’ experience of the solutions you provide—typically websites and apps.

Since quantitative methods are focused on numerical results, we’ll also be covering statistical analysis at a basic level. You don’t need any prior knowledge or experience of statistics, and we won’t be threatening you with mathematical formulas. The approach here is very practical, and we’ll be relying instead on the numerous free tools available for analysis using some of the most common statistical methods.

In the “Build Your Portfolio: Research Data Project”, you’ll find a series of practical exercises that will give you first-hand experience of the methods we’ll cover. If you want to complete these optional exercises, you’ll create a series of case studies for your portfolio which you can show your future employer or freelance customers.

Your instructor is William Hudson. He’s been active in interactive software development for around 50 years and HCI/User Experience for 30. He has been primarily a freelance consultant but also an author, reviewer and instructor in software development and user-centered design.

You earn a verifiable and industry-trusted Course Certificate once you’ve completed the course. You can highlight it on your resume, your LinkedIn profile or your website.

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