Power Analysis Planner

What it does

Walks you through a complete power analysis for your study, helping you justify your sample size to reviewers and IRBs.

Supported Designs

• Between-subjects (independent samples t-test, one-way ANOVA)
• Within-subjects (paired t-test, repeated measures ANOVA)
• Factorial designs (interaction effects, simple effects)
• Regression (single and multiple predictors)
• Correlation studies
• Mediation/moderation (PROCESS macro approach)

What you get

1. Effect size selection prompts (with Cohen conventions + field norms)
2. G*Power walkthrough for any analysis type
3. Sensitivity analysis for when sample size is fixed
4. IRB-ready justification paragraph
5. Sample size table for multiple power levels

How to use

Describe your study design to the AI and follow the guided prompts. Outputs G*Power settings you can screenshot for your methods section.