For students and researchers working out how large a study result is, not just whether it is statistically significant. Calculate Cohen’s d from group means and standard deviations, convert between common effect-size measures, and compare results across studies. You leave with the calculation, an interpretation in context, and a comparison table you can use in a report or literature review.
Effect Sizes
Calculate and interpret Cohen’s d, correlations, and other effect sizes from study results.
Use Effect Sizes
$49.99 / month
Includes every Agent on Ai-GEN. 15,000+ Agents for one monthly price, cancel anytime.
From the creator of GPTs with 8.5M+ chats · 4.2 stars · 37K+ reviews
Start Effect Sizes — $49.99 / month
Your account is created at checkout. After payment, this Agent opens when access is ready.
Already subscribed? Sign in · Account terms
Cancel future renewals from Account & Billing → Subscriptions.
What it writes
- Effect-size calculation with working
- Plain-language interpretation of the result
- Side-by-side effect-size comparison table
How to use it
Include the effect-size measure you need, the exact group means, standard deviations, and sample sizes, plus whether groups are independent or paired. That lets the calculation use the right formula and gives the interpretation its study context.
What you bring
- Group means and standard deviations
- Sample sizes for each group
- Effect-size value and measure name
- Know which groups or variables you are comparing
A good fit for
- Comparing treatment and control group outcomes for a class project
- Interpreting a statistically significant result for a research paper
- Comparing effect sizes reported in studies using different measures
Ways to start
A few requests this Agent can handle.
Calculate Cohen’s d for a treatment group with mean 18.4 and SD 4.2, and a control group with mean 15.1 and SD 3.8. Explain the result.
My study found r = .32 with 84 participants. Explain the effect size and show how to report it in an APA-style results sentence.
Compare these studies: one reports Cohen’s d = 0.45, the other reports r = .21. Explain the conversion assumptions and which result is larger.
Good to know
This workspace provides text assistance.
- Choosing a statistical test for a full study design
- Calculations depend on accurate numbers typed into chat
- Cannot inspect datasets, papers, or statistical software output files
Before you subscribe
What am I buying?
One monthly subscription that opens this Agent and every other Agent on Ai-GEN. Cancel from Account & Billing.
What happens after payment?
Checkout creates or uses your Ai-GEN account. When payment and entitlement are confirmed, the purchased Agent opens. Choose a starter task, add your inputs, and send your first request.
Can I cancel?
Yes. Manage cancellation under Account & Billing → Subscriptions. Review the status and cancellation details shown there before confirming.
Can I use the response in my work?
Use it as a draft to review and adapt. Verify calculations, facts, rights, and suitability before relying on it. Do not provide information you do not have permission to share.
Report This Agent
Tell Ai-GEN about broken behavior, poor performance, misleading capabilities, or a safety concern.