How accurate are admixture calculators? An honest audit
Accuracy has three different meanings for an ancestry calculator, and the tools do well on exactly one of them. Where percentages are trustworthy, where they are noise, and how to tell which regime you are in.
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What is an admixture calculator? How ancestry percentages are actually computed
Every admixture calculator — GEDmatch's classics, Global25 fits, testing-company estimates — is an optimiser that cannot say no. How the three families work, what the percentages mean, and the questions a calculator can and cannot answer.
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qpAdm analysis tutorial: from a raw DNA file to a model with a p-value
A step-by-step qpAdm tutorial: check your raw file, merge it into AADR v66, choose sources and outgroups, run it in the browser or in R, and read the result.
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Is qpAdm worth it? qpAdm versus admixture calculators and percentage tools
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