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per-comparison error rate

per-comparison error rate Per-comparison error rate is the chance of a Type I error for any single significance test when several tests are being run.

Per-comparison error rate is the chance of a Type I error for any single significance test when several tests are being run. It refers to the error rate for each individual comparison, not for the whole set of tests taken together.

Also see

Sources

Drafting source: Online Statistics Education, version 2 (David M. Lane, project leader). Version 2; publisher statement snapshot 2026-10-18; SHA-256 0dcad9ee85f61f9e2bb24d26279de155ac749164ea4da2a3bffeabcf9ea471a6. “Per-Comparison Error Rate” (per-comparison.html).
public-domain-US · Source snapshot SHA-256: 18d716c0090445c387bbb54c251731e9ba6338832530762dc4ba2138912b3efa

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “per-comparison error rate.” Development preview.

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