How to write a research participant recruitment brief

A recruitment brief is the handoff between a research question and the person finding participants. It should let a recruiter explain why someone fits, recognize when a detail needs clarification, and arrange the session without silently changing the study.

The most important distinction is between essential experience and useful variation. Essential experience makes someone able to answer the question. Useful variation helps you examine different contexts. A preference that has no connection to the research should not become an exclusion rule.

This guide provides a working brief for a fictional study of returns processing at small online retailers. The example criteria are illustrative; they are not findings about retailers or a recommended universal sample.

Start with the decision the study serves

Give the recruiter a short explanation of what the team needs to learn. Do not send only a list of titles, company sizes, and dates.

For the fictional study: “We want to understand how a returned item moves from receipt to a decision about restocking or another disposition, especially when more than one team participates.”

The recruiter can now understand why a warehouse operator might fit while a senior executive with no recent involvement might not. The brief should still identify who makes the final eligibility decision when the answer is unclear.

GOV.UK recommends written recruitment instructions and checking the resulting screener against those instructions. A written record matters when more than one person is interpreting the criteria. Read the recruitment brief guidance.

Divide the criteria into three groups

Essential: The participant has personally handled the part of the workflow under study within a relevant period. Choose that period based on the task, not a default recency rule.

Coverage: You want to hear from different operating contexts that could change the workflow. In the example, those might include teams using their own storage space and teams working with an outside fulfillment provider.

Not required: A particular job title, positive or negative opinion, use of your preferred tool, or willingness to buy your product—unless the study specifically needs that condition and the reason is explicit.

This separation prevents recruiting convenience from quietly redefining the target audience.

Copy the working brief

Replace every placeholder before handing over the brief. A field marked “to be filled in” is a planning gap, not information a recruiter should improvise.

State what the participant will and will not do

Explain whether the session is a discussion, an observation, a prototype test, or a combination. Describe the preparation, equipment, and materials needed.

For this example, the person would discuss a recent returns workflow without showing identifiable customer information. If the study later changes to screen sharing, update the participant information and arrangements before asking for that activity.

The Home Office recruitment guidance includes the project purpose, timing, incentives, and a contact person in the brief. It also emphasizes voluntary participation. Those are useful operational details beyond the eligibility criteria. Read the participant recruitment guidance.

Do not frame attendance as an obligation from a manager or business relationship. The person should understand that declining is acceptable.

Define how to verify fit

Give the recruiter one or two open factual prompts for each essential criterion. “What part of returns processing did you personally handle most recently?” is more informative than “Are you a returns expert?”

Add interpretation notes. An answer describing direct receipt of items could fit the receiving perspective. An answer about approving the overall vendor contract may be useful for another study but does not establish the needed operating experience.

Do not ask the recruiter to judge whether the participant agrees with the product premise. A smooth existing process can be relevant evidence.

A screener establishes likely fit for a study. It is not a guarantee of identity, professional competence, or the truth of every claim a participant makes.

Review the first candidates before scaling recruitment

Inspect a small initial set against the written criteria. Look at the actual qualification notes rather than only a recruiter’s “qualified” label.

If a candidate is a poor fit, identify the exact mismatch. Did the brief omit a responsibility? Was a term misunderstood? Did the screener ask only about familiarity rather than direct participation? Fix that cause before sourcing a larger group.

If your own criteria were wrong, change the brief openly. Record the version and explain whether already-booked participants remain useful. Do not retroactively treat a changed criterion as though it had always been part of the study.

Add an exception and replacement process

Agree how to handle cancellations, uncertain eligibility, unavailable formats, and missing coverage. A replacement should meet the relevant criteria for the open slot, not merely be available at the same time.

For the returns example, replacing a receiving operator with another purchasing manager might increase the total number of sessions while leaving the same evidence gap.

Keep participant information limited to what the team needs to arrange and conduct the study. Define who needs access and how recruitment notes will be handled afterward.

Use the brief during analysis too

Compare the achieved sample with the intended coverage. If one fulfillment arrangement or role remains absent, state that in the findings. The brief becomes a record of what the study intended to cover and what it actually reached.

A useful recruitment handoff ends with shared interpretation, not simply a document sent. The researcher and recruiter should be able to explain the same qualifying experience, the same exceptions, and the same remaining gaps.