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ALA: A Primer on A/B Testing

DATA IS AN invaluable tool for web designers making decisions about the user experience. A/B tests, or split tests, are one of the easiest ways to measure the effect of different design, content, or functionality, helping you create high-performing user experience elements to implement across your site. Lara Swanson shows how to make sure you avoid red herrings and reach statistically significant results in Issue No. 333 of A List Apart for people who make websites.

A List Apart: Articles: A Primer on A/B Testing.


Illustration by Kevin Cornell for A List Apart Magazine.

By Jeffrey Zeldman

“King of Web Standards”—Bloomberg Businessweek.

Designer at Automattic, Inc. Co-Founder, An Event Apart. Publisher, A List Apart & A Book Apart. Author. Father. He/him.