Participant studies
Monitor recruitment, cost, and attrition
Use the experiment activity dashboard to detect drop-off, failed calls, retention loss, and budget pressure while a study is live.
The basic idea
Operational monitoring protects both participants and inference. Completion, treatment exposure, failures, and cost per completion should be examined together without changing a locked protocol in response to interim outcomes.
Watch whether participants reach the pre-measure, treatment, questionnaire, and delayed assessment while monitoring failed model calls and remaining owner credits.
How to do it
- 1
Open the experiment and review Researcher activity.
- 2
Compare starts, exposures, completions, and the largest recorded drop-off stage.
- 3
Check failures, active runs, provider cost, cost per completion, retention returns, and reminder delivery.
- 4
Pause recruitment if a technical or funding problem could create systematically missing treatment data.
What to watch for
- The largest drop-off label is descriptive, not a causal diagnosis.
- Do not repeatedly inspect treatment outcomes unless the analysis plan permits it.
- Collaborators can see experiment operations; only the owner pays.
What a useful result looks like
A compact operational record shows whether recruitment is producing usable, fully exposed cases at an acceptable cost.