Before comparing quotes, ask every research partner to explain how they would answer the same sleep question. Two proposals can both include a wearable and a questionnaire while measuring different outcomes, collecting data over different periods, and supporting different conclusions.
Send each partner the same brief. Include the product or ingredient, intended population, the sleep outcome you care about, and the decision you want the results to inform. Ask for written answers to the five questions below.
| Ask the research partner | Look for in the proposal |
|---|---|
| 1. What is the primary sleep outcome? | A named outcome, such as time to fall asleep or perceived sleep quality, with an explanation of why it matches your question. Ask how the partner will measure change and when. |
| 2. Why these wearable measures and questionnaires? | The device, metric, questionnaire, and schedule. Ask what supports each measure’s use in your population and whether the wearable and questionnaire cover comparable periods. For research methods, see how wearable data and questionnaires fit together. |
| 3. How will you handle missing nights? | Written rules for a usable night and an analyzable participant. Ask what happens when a device fails to sync, a participant skips a questionnaire, or someone drops out. Ask how missing data and exclusions will appear in the final report. |
| 4. What will the results be compared with? | A clear rationale for comparing participants with their own baseline or including a control group. If the proposal includes a control group, ask how participants will be assigned and who will know which group they are in. |
| 5. What could the study show, and what will we receive? | Ask the team to show how it would report a positive, inconclusive, or null result. Request a sample report with the outcome estimates, uncertainty, missing data, and study limitations visible. Clarify which data and documents you can access. |
Ask how the partner would interpret a disagreement
Try a hypothetical example in your vendor call. The wearable estimates that participants fell asleep sooner, but their questionnaire scores show little change. Ask how the partner would explain that difference. A useful answer should address what each measure captures, when each was collected, how much data was missing, and which outcome the protocol designated as primary.
Read a published example
In a published phytomelatonin pilot, researchers used Oura Ring data and the Pittsburgh Sleep Quality Index to assess how long participants took to fall asleep. The two sources captured device estimates and participant reports. The study was open-label and had no control group, so its findings describe changes from baseline among participants who completed the study. The cause of those changes remains uncertain. See the study summary and published abstract.
For a broader comparison of study designs, budgets, and deliverables, use the clinical studies buyer’s guide for ingredient manufacturers.