Why your A/B test is lying to you
Underpowered tests and early peeking produce false wins that evaporate in production. How to read a test like a growth designer.
John Carter
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Include a personal profile or introduction statement at the top of your resume
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Add an infographic element that displays your best traits and accomplishments
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Use headings and subheadings throughout your resume to highlight key sections and make the information easier to read
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Utilize space by using bullet points to outline skills and job qualifications
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Incorporate visuals and images such as graphs and charts
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April 10, 2026
Why most A/B tests mislead
Underpowered tests, peeking at results early, and ignoring novelty effects produce false wins that evaporate in production. A result that looks like a 9% lift on day two often regresses to noise by day fourteen. Significance is not the same as a durable effect.
Reading a test like a growth designer
Decide your sample size and duration before you launch. Watch the confidence interval, not just the point estimate. Always ask whether the lift survives a full business cycle: weekday and weekend, paid and organic. The discipline of not fooling yourself is the actual skill.
