# Simple Sequential A/B Testing

DevFeed: [Simple Sequential A/B Testing](<https://devfeed.tech/articles/simple-sequential-a-b-testing-37898.md>)

Original publisher: [Read original article](<https://www.evanmiller.org/sequential-ab-testing.html>)

Author: Evan Miller

Published: 2015-10-13T12:15:00Z

Content type: article

Language: en

Sources: [Evan Miller](<https://devfeed.tech/sources/evan-miller.md>)

Topics: [A/B Testing](<https://devfeed.tech/topics/a-b-testing.md>), [Testing](<https://devfeed.tech/topics/testing.md>)

Tags: [a-b-testing](<https://devfeed.tech/tags/a-b-testing.md>), [conversion](<https://devfeed.tech/tags/conversion.md>), [sequential-testing](<https://devfeed.tech/tags/sequential-testing.md>), [statistical-significance](<https://devfeed.tech/tags/statistical-significance.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

Evan Miller presents a simple sequential A/B testing procedure that allows experiments to stop early when treatment performance appears superior or to stop without declaring a winner when the combined number of successes reaches the chosen sample size. The method is described as especially effective for low-conversion-rate experiments.

## Source excerpt

Cut your A/B sample sizes in half, using this one weird trick: Simple Sequential A/B Testing