Build your eligibility framework, justify your sample, plan your fieldwork
Three sequential tools that take your confirmed variable framework and build your sampling plan — eligibility criteria, sample size with reasoning, and fieldwork feasibility. The tool guides your thinking — it doesn't do the work for you.
Standard mode works through each tool step by step with coaching dialogue. Express mode delivers structured output immediately across all three tools.
Your research context
Enter your research question and proposed study design. If you completed Module 2, your variable framework has already been built — bring the key details here.
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Module 3 currently supports primary data collection studies. Systematic review planning (search strategy, PRISMA screening, extraction) is on the roadmap as a future tool.
Eligibility & population framework
Tool 1 will examine the gap between your broad target population and the study population you can actually recruit.
Before we examine your eligibility framework
Standard mode asks you to articulate your reasoning first — so the coaching responds to your thinking, not just your inputs.
What was your reasoning behind these specific inclusion and exclusion criteria? Did you consider how they affect who you can generalize your findings to?
Examining your eligibility framework...
Tool 2 — Sample Size & Sampling Strategy
Sample size and sampling strategy are connected decisions. This tool works through both together, with the reasoning behind the number — not just the number.
Prevalence & Precision
Sample size here is precision-based, not power-based — you're estimating how confidently you can pin down a proportion, not testing a hypothesis.
Association Parameters
You're testing whether an association is real, not just estimating a proportion — power and alpha govern your chance of detecting it if it exists.
Non-Response Adjustment
Your calculated sample size assumes everyone approached participates — this inflates it to account for the ones who won't.
Design Effect & Sampling Strategy
How will you actually select participants from your target population?
Working through your sample size...
Tool 3 — Fieldwork & Recruitment Planning
Translate your eligibility framework and sampling strategy into a practical fieldwork plan — sites, timeline, recruitment approach, and quality assurance.