Testing program Articles — Atticus Li

Atticus Li

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Testing program

Articles exploring testing program through the lens of behavioral science and experimentation. Practical frameworks for growth leaders who measure in revenue, not vanity metrics.

2 articles

a/b testing Apr 19, 2026 10 min read

A/B Testing: The Complete Guide for Practitioners

A program-level A/B testing guide from someone who has run 100+ experiments per year at a Fortune 150 company. Covers hypothesis quality, win rates, scaling, and building institutional learning.

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simultaneous tests Mar 27, 2026 7 min read

Running Multiple A/B Tests Simultaneously: When It Works and When It Doesn't

Understand when running concurrent A/B tests is safe and when it introduces risk. Learn how interaction effects work, how to assess risk, and how to balance test velocity with result accuracy.

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