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Stage 2
Research Design
Design rigorous studies — from IRB protocols to power calculations, experiments to surveys.
5 skills·2 free
FreeEthics & IRBFree
IRB Protocol Builder
4.5(2)
Step-by-step AI assistant for writing complete IRB research protocols
IRBethicsinformed consent+1
FreeStudy PlanningFree
Power Analysis Planner
5.0(2)
Calculate sample sizes and statistical power for any psychology study design
power analysissample sizeG*Power+1
PremiumStudy Planning¥19.99
Experiment Design Advisor
4.0(1)
Design valid, efficient experiments — from factorial designs to EMA studies
factorial designEMAwithin-subjects+1
PremiumSurvey Design¥14.99
Survey Design Wizard
4.5(2)
Design psychometrically valid surveys with AI-guided item writing and scale construction
survey designpsychometricsLikert scale+2
PremiumStudy Planning¥14.99
Preregistration Builder
4.0(1)
Write a complete OSF or AsPredicted preregistration in under an hour
preregistrationOSFopen science+1