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Make ab-tests create 50/50 cohorts #3674

ianb opened this Issue Oct 25, 2017 · 1 comment


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ianb commented Oct 25, 2017

We should change ab-tests.js to do cohort selection, then 50/50 control/experiment (or 33/33/33 for three tests, etc). The cohort selection might be 99/1, 90/10, 90/10 except only en-US, etc.

I think we should change from just ("control", experiment_name) to ("excluded", "control", experiment_name).

@ianb ianb self-assigned this Oct 25, 2017


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johngruen Oct 26, 2017


putting this in 58, but this is kick-outable


johngruen commented Oct 26, 2017

putting this in 58, but this is kick-outable

@johngruen johngruen modified the milestones: Launch 58, Bucket ☕️, Sprint 1 (59-0) Oct 26, 2017

ianb added a commit that referenced this issue Nov 3, 2017

Fix #3674, put 50% of people into control
This separates out people who are excluded from a test, from those who are in the control for the test. 50% of people always go to control, and 50% go into some experiment branch. People who aren't in either go into the 'exclude' category.

@6a68 6a68 closed this in a583d99 Nov 6, 2017

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