Power Analysis for Dissertations
Estimate recruitment after attrition, explore cluster design effects, and document the assumptions behind your sample-size plan.
Open the planning hubNeed a conventional test calculator? Use the DASS calculators ↗
FREE TOOLS FOR DOCTORAL RESEARCH
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Go deeper when you need to.
Plan your sample, check your statistics, and turn results into clear APA-style reporting with free tools and guides. When you need the complete analysis, our R Markdown workflows pick up where the tools leave off.
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APA 7 results formatters
Turn statistical output into clean, copy-ready APA sentences directly in your browser.
Open the formatterNeed the full analysis, not just the sentence? Core Statistical Analyses workflow ($39) →
Check a reported p-value
Recompute the exact p from a t, F, chi-square, or correlation statistic and compare it with the reported value.
Check a p-valueNOT SURE WHICH TEST FITS?
Use the plain-language test chooser.
Answer a few questions about your goal and variables to get a suggested statistical test, assumptions to check, and links to related tools.
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See how a full analysis can combine reproducible code, diagnostics, interpretation guidance, output tables, and a results narrative.
PRACTICAL GUIDES
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next decision.
Clear explanations for recurring questions in doctoral research.
WRITINGHow to Write the Results Chapter (APA 7)→WRITINGHow to Write a Dissertation Abstract (APA 7)→DATA-DRIVENWhat Statistical Methods Do Psychology Dissertations and Theses Use?→DATA PREPARATIONThe Data Audit Checklist to Run First↗MISSING DATAFIML vs. Multiple Imputation: Which Should You Use?↗COMMITTEE FEEDBACKWhat to Do When a Reviewer Challenges Your Model↗STUDY DESIGNWhy Power for Cluster-Randomized Trials Isn't Simple↗PLANNING SUPPORTHow Much Does a Statistical Consultant Cost?↗
WHEN A TOOL ISN'T ENOUGH
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A calculator can give you a number. A consultation can help you decide whether the calculation fits your research question, design, data, and committee expectations.
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